diff --git a/modules/openapi-generator/src/main/resources/python/api.mustache b/modules/openapi-generator/src/main/resources/python/api.mustache
index 18ced57845ee..1dcbb8607863 100644
--- a/modules/openapi-generator/src/main/resources/python/api.mustache
+++ b/modules/openapi-generator/src/main/resources/python/api.mustache
@@ -103,6 +103,10 @@ class {{classname}}(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -137,7 +141,8 @@ class {{classname}}(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -266,6 +271,7 @@ class {{classname}}(object):
             {{#servers.0}}
             _host=local_var_host,
             {{/servers.0}}
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 {{/operation}}
 {{/operations}}
diff --git a/modules/openapi-generator/src/main/resources/python/api_client.mustache b/modules/openapi-generator/src/main/resources/python/api_client.mustache
index 66d3577f3c25..7eb04b6943df 100644
--- a/modules/openapi-generator/src/main/resources/python/api_client.mustache
+++ b/modules/openapi-generator/src/main/resources/python/api_client.mustache
@@ -132,7 +132,8 @@ class ApiClient(object):
             query_params=None, header_params=None, body=None, post_params=None,
             files=None, response_type=None, auth_settings=None,
             _return_http_data_only=None, collection_formats=None,
-            _preload_content=True, _request_timeout=None, _host=None):
+            _preload_content=True, _request_timeout=None, _host=None,
+            _request_auth=None):
 
         config = self.configuration
 
@@ -173,7 +174,9 @@ class ApiClient(object):
             post_params.extend(self.files_parameters(files))
 
         # auth setting
-        self.update_params_for_auth(header_params, query_params, auth_settings)
+        self.update_params_for_auth(
+            header_params, query_params, auth_settings,
+            request_auth=_request_auth)
 
         # body
         if body:
@@ -347,7 +350,8 @@ class ApiClient(object):
                  body=None, post_params=None, files=None,
                  response_type=None, auth_settings=None, async_req=None,
                  _return_http_data_only=None, collection_formats=None,
-                 _preload_content=True, _request_timeout=None, _host=None):
+                 _preload_content=True, _request_timeout=None, _host=None,
+                 _request_auth=None):
         """Makes the HTTP request (synchronous) and returns deserialized data.
 
         To make an async_req request, set the async_req parameter.
@@ -377,6 +381,10 @@ class ApiClient(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_token: dict, optional
         :return:
             If async_req parameter is True,
             the request will be called asynchronously.
@@ -390,7 +398,8 @@ class ApiClient(object):
                                    body, post_params, files,
                                    response_type, auth_settings,
                                    _return_http_data_only, collection_formats,
-                                   _preload_content, _request_timeout, _host)
+                                   _preload_content, _request_timeout, _host,
+                                   _request_auth)
 
         return self.pool.apply_async(self.__call_api, (resource_path,
                                                        method, path_params,
@@ -403,7 +412,7 @@ class ApiClient(object):
                                                        collection_formats,
                                                        _preload_content,
                                                        _request_timeout,
-                                                       _host))
+                                                       _host, _request_auth))
 
     def request(self, method, url, query_params=None, headers=None,
                 post_params=None, body=None, _preload_content=True,
@@ -550,29 +559,45 @@ class ApiClient(object):
         else:
             return content_types[0]
 
-    def update_params_for_auth(self, headers, querys, auth_settings):
+    def update_params_for_auth(self, headers, querys, auth_settings,
+                               request_auth=None):
         """Updates header and query params based on authentication setting.
 
         :param headers: Header parameters dict to be updated.
         :param querys: Query parameters tuple list to be updated.
         :param auth_settings: Authentication setting identifiers list.
+        :param request_auth: if set, the provided settings will
+                             override the token in the configuration.
         """
         if not auth_settings:
             return
 
+        if request_auth:
+            self._apply_auth_params(headers, querys, request_auth)
+            return
+
         for auth in auth_settings:
             auth_setting = self.configuration.auth_settings().get(auth)
             if auth_setting:
-                if auth_setting['in'] == 'cookie':
-                    headers['Cookie'] = auth_setting['value']
-                elif auth_setting['in'] == 'header':
-                    headers[auth_setting['key']] = auth_setting['value']
-                elif auth_setting['in'] == 'query':
-                    querys.append((auth_setting['key'], auth_setting['value']))
-                else:
-                    raise ApiValueError(
-                        'Authentication token must be in `query` or `header`'
-                    )
+                self._apply_auth_params(headers, querys, auth_setting)
+
+    def _apply_auth_params(self, headers, querys, auth_setting):
+        """Updates the request parameters based on a single auth_setting
+
+        :param headers: Header parameters dict to be updated.
+        :param querys: Query parameters tuple list to be updated.
+        :param auth_setting: auth settings for the endpoint
+        """
+        if auth_setting['in'] == 'cookie':
+            headers['Cookie'] = auth_setting['value']
+        elif auth_setting['in'] == 'header':
+            headers[auth_setting['key']] = auth_setting['value']
+        elif auth_setting['in'] == 'query':
+            querys.append((auth_setting['key'], auth_setting['value']))
+        else:
+            raise ApiValueError(
+                'Authentication token must be in `query` or `header`'
+            )
 
     def __deserialize_file(self, response):
         """Deserializes body to file
diff --git a/samples/client/petstore/python-asyncio/petstore_api/api/another_fake_api.py b/samples/client/petstore/python-asyncio/petstore_api/api/another_fake_api.py
index 4d69b287ca8b..562b9faa58f2 100644
--- a/samples/client/petstore/python-asyncio/petstore_api/api/another_fake_api.py
+++ b/samples/client/petstore/python-asyncio/petstore_api/api/another_fake_api.py
@@ -91,6 +91,10 @@ class AnotherFakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -107,7 +111,8 @@ class AnotherFakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -163,4 +168,5 @@ class AnotherFakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
diff --git a/samples/client/petstore/python-asyncio/petstore_api/api/fake_api.py b/samples/client/petstore/python-asyncio/petstore_api/api/fake_api.py
index 7789acf51c3d..b171fe8b3d7d 100644
--- a/samples/client/petstore/python-asyncio/petstore_api/api/fake_api.py
+++ b/samples/client/petstore/python-asyncio/petstore_api/api/fake_api.py
@@ -91,6 +91,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -107,7 +111,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -159,7 +164,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def fake_outer_boolean_serialize(self, **kwargs):  # noqa: E501
         """fake_outer_boolean_serialize  # noqa: E501
@@ -216,6 +222,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -232,7 +242,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -280,7 +291,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def fake_outer_composite_serialize(self, **kwargs):  # noqa: E501
         """fake_outer_composite_serialize  # noqa: E501
@@ -337,6 +349,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -353,7 +369,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -401,7 +418,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def fake_outer_number_serialize(self, **kwargs):  # noqa: E501
         """fake_outer_number_serialize  # noqa: E501
@@ -458,6 +476,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -474,7 +496,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -522,7 +545,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def fake_outer_string_serialize(self, **kwargs):  # noqa: E501
         """fake_outer_string_serialize  # noqa: E501
@@ -579,6 +603,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -595,7 +623,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -643,7 +672,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def test_body_with_file_schema(self, body, **kwargs):  # noqa: E501
         """test_body_with_file_schema  # noqa: E501
@@ -700,6 +730,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -716,7 +750,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -768,7 +803,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def test_body_with_query_params(self, query, body, **kwargs):  # noqa: E501
         """test_body_with_query_params  # noqa: E501
@@ -827,6 +863,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -844,7 +884,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -902,7 +943,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def test_client_model(self, body, **kwargs):  # noqa: E501
         """To test \"client\" model  # noqa: E501
@@ -959,6 +1001,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -975,7 +1021,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -1031,7 +1078,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def test_endpoint_parameters(self, number, double, pattern_without_delimiter, byte, **kwargs):  # noqa: E501
         """Fake endpoint for testing various parameters  假端點  偽のエンドポイント  가짜 엔드 포인트  # noqa: E501
@@ -1140,6 +1188,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -1169,7 +1221,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -1287,7 +1340,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def test_enum_parameters(self, **kwargs):  # noqa: E501
         """To test enum parameters  # noqa: E501
@@ -1372,6 +1426,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -1395,7 +1453,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -1460,7 +1519,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def test_group_parameters(self, required_string_group, required_boolean_group, required_int64_group, **kwargs):  # noqa: E501
         """Fake endpoint to test group parameters (optional)  # noqa: E501
@@ -1537,6 +1597,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -1558,7 +1622,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -1624,7 +1689,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def test_inline_additional_properties(self, param, **kwargs):  # noqa: E501
         """test inline additionalProperties  # noqa: E501
@@ -1679,6 +1745,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -1695,7 +1765,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -1747,7 +1818,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def test_json_form_data(self, param, param2, **kwargs):  # noqa: E501
         """test json serialization of form data  # noqa: E501
@@ -1806,6 +1878,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -1823,7 +1899,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -1881,7 +1958,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def test_query_parameter_collection_format(self, pipe, ioutil, http, url, context, **kwargs):  # noqa: E501
         """test_query_parameter_collection_format  # noqa: E501
@@ -1954,6 +2032,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -1974,7 +2056,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -2051,4 +2134,5 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
diff --git a/samples/client/petstore/python-asyncio/petstore_api/api/fake_classname_tags_123_api.py b/samples/client/petstore/python-asyncio/petstore_api/api/fake_classname_tags_123_api.py
index d963591a49a8..5cd445261491 100644
--- a/samples/client/petstore/python-asyncio/petstore_api/api/fake_classname_tags_123_api.py
+++ b/samples/client/petstore/python-asyncio/petstore_api/api/fake_classname_tags_123_api.py
@@ -91,6 +91,10 @@ class FakeClassnameTags123Api(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -107,7 +111,8 @@ class FakeClassnameTags123Api(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -163,4 +168,5 @@ class FakeClassnameTags123Api(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
diff --git a/samples/client/petstore/python-asyncio/petstore_api/api/pet_api.py b/samples/client/petstore/python-asyncio/petstore_api/api/pet_api.py
index 7002fe32740f..3119e2d60c45 100644
--- a/samples/client/petstore/python-asyncio/petstore_api/api/pet_api.py
+++ b/samples/client/petstore/python-asyncio/petstore_api/api/pet_api.py
@@ -89,6 +89,10 @@ class PetApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -105,7 +109,8 @@ class PetApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -157,7 +162,8 @@ class PetApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def delete_pet(self, pet_id, **kwargs):  # noqa: E501
         """Deletes a pet  # noqa: E501
@@ -216,6 +222,10 @@ class PetApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -233,7 +243,8 @@ class PetApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -283,7 +294,8 @@ class PetApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def find_pets_by_status(self, status, **kwargs):  # noqa: E501
         """Finds Pets by status  # noqa: E501
@@ -340,6 +352,10 @@ class PetApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -356,7 +372,8 @@ class PetApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -409,7 +426,8 @@ class PetApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def find_pets_by_tags(self, tags, **kwargs):  # noqa: E501
         """Finds Pets by tags  # noqa: E501
@@ -466,6 +484,10 @@ class PetApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -482,7 +504,8 @@ class PetApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -535,7 +558,8 @@ class PetApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def get_pet_by_id(self, pet_id, **kwargs):  # noqa: E501
         """Find pet by ID  # noqa: E501
@@ -592,6 +616,10 @@ class PetApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -608,7 +636,8 @@ class PetApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -660,7 +689,8 @@ class PetApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def update_pet(self, body, **kwargs):  # noqa: E501
         """Update an existing pet  # noqa: E501
@@ -715,6 +745,10 @@ class PetApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -731,7 +765,8 @@ class PetApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -783,7 +818,8 @@ class PetApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def update_pet_with_form(self, pet_id, **kwargs):  # noqa: E501
         """Updates a pet in the store with form data  # noqa: E501
@@ -846,6 +882,10 @@ class PetApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -864,7 +904,8 @@ class PetApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -920,7 +961,8 @@ class PetApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def upload_file(self, pet_id, **kwargs):  # noqa: E501
         """uploads an image  # noqa: E501
@@ -983,6 +1025,10 @@ class PetApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -1001,7 +1047,8 @@ class PetApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -1061,7 +1108,8 @@ class PetApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def upload_file_with_required_file(self, pet_id, required_file, **kwargs):  # noqa: E501
         """uploads an image (required)  # noqa: E501
@@ -1124,6 +1172,10 @@ class PetApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -1142,7 +1194,8 @@ class PetApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -1206,4 +1259,5 @@ class PetApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
diff --git a/samples/client/petstore/python-asyncio/petstore_api/api/store_api.py b/samples/client/petstore/python-asyncio/petstore_api/api/store_api.py
index 0ede23f05ba2..d2d4c3233341 100644
--- a/samples/client/petstore/python-asyncio/petstore_api/api/store_api.py
+++ b/samples/client/petstore/python-asyncio/petstore_api/api/store_api.py
@@ -91,6 +91,10 @@ class StoreApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -107,7 +111,8 @@ class StoreApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -155,7 +160,8 @@ class StoreApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def get_inventory(self, **kwargs):  # noqa: E501
         """Returns pet inventories by status  # noqa: E501
@@ -208,6 +214,10 @@ class StoreApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -223,7 +233,8 @@ class StoreApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -269,7 +280,8 @@ class StoreApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def get_order_by_id(self, order_id, **kwargs):  # noqa: E501
         """Find purchase order by ID  # noqa: E501
@@ -326,6 +338,10 @@ class StoreApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -342,7 +358,8 @@ class StoreApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -398,7 +415,8 @@ class StoreApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def place_order(self, body, **kwargs):  # noqa: E501
         """Place an order for a pet  # noqa: E501
@@ -453,6 +471,10 @@ class StoreApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -469,7 +491,8 @@ class StoreApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -521,4 +544,5 @@ class StoreApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
diff --git a/samples/client/petstore/python-asyncio/petstore_api/api/user_api.py b/samples/client/petstore/python-asyncio/petstore_api/api/user_api.py
index a912483b023b..9504f2834a6b 100644
--- a/samples/client/petstore/python-asyncio/petstore_api/api/user_api.py
+++ b/samples/client/petstore/python-asyncio/petstore_api/api/user_api.py
@@ -91,6 +91,10 @@ class UserApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -107,7 +111,8 @@ class UserApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -155,7 +160,8 @@ class UserApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def create_users_with_array_input(self, body, **kwargs):  # noqa: E501
         """Creates list of users with given input array  # noqa: E501
@@ -210,6 +216,10 @@ class UserApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -226,7 +236,8 @@ class UserApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -274,7 +285,8 @@ class UserApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def create_users_with_list_input(self, body, **kwargs):  # noqa: E501
         """Creates list of users with given input array  # noqa: E501
@@ -329,6 +341,10 @@ class UserApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -345,7 +361,8 @@ class UserApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -393,7 +410,8 @@ class UserApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def delete_user(self, username, **kwargs):  # noqa: E501
         """Delete user  # noqa: E501
@@ -450,6 +468,10 @@ class UserApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -466,7 +488,8 @@ class UserApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -514,7 +537,8 @@ class UserApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def get_user_by_name(self, username, **kwargs):  # noqa: E501
         """Get user by user name  # noqa: E501
@@ -569,6 +593,10 @@ class UserApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -585,7 +613,8 @@ class UserApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -637,7 +666,8 @@ class UserApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def login_user(self, username, password, **kwargs):  # noqa: E501
         """Logs user into the system  # noqa: E501
@@ -696,6 +726,10 @@ class UserApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -713,7 +747,8 @@ class UserApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -771,7 +806,8 @@ class UserApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def logout_user(self, **kwargs):  # noqa: E501
         """Logs out current logged in user session  # noqa: E501
@@ -822,6 +858,10 @@ class UserApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -837,7 +877,8 @@ class UserApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -879,7 +920,8 @@ class UserApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def update_user(self, username, body, **kwargs):  # noqa: E501
         """Updated user  # noqa: E501
@@ -940,6 +982,10 @@ class UserApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -957,7 +1003,8 @@ class UserApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -1011,4 +1058,5 @@ class UserApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
diff --git a/samples/client/petstore/python-asyncio/petstore_api/api_client.py b/samples/client/petstore/python-asyncio/petstore_api/api_client.py
index 7e0d28cd4c68..cc78cbda5421 100644
--- a/samples/client/petstore/python-asyncio/petstore_api/api_client.py
+++ b/samples/client/petstore/python-asyncio/petstore_api/api_client.py
@@ -123,7 +123,8 @@ class ApiClient(object):
             query_params=None, header_params=None, body=None, post_params=None,
             files=None, response_type=None, auth_settings=None,
             _return_http_data_only=None, collection_formats=None,
-            _preload_content=True, _request_timeout=None, _host=None):
+            _preload_content=True, _request_timeout=None, _host=None,
+            _request_auth=None):
 
         config = self.configuration
 
@@ -164,7 +165,9 @@ class ApiClient(object):
             post_params.extend(self.files_parameters(files))
 
         # auth setting
-        self.update_params_for_auth(header_params, query_params, auth_settings)
+        self.update_params_for_auth(
+            header_params, query_params, auth_settings,
+            request_auth=_request_auth)
 
         # body
         if body:
@@ -324,7 +327,8 @@ class ApiClient(object):
                  body=None, post_params=None, files=None,
                  response_type=None, auth_settings=None, async_req=None,
                  _return_http_data_only=None, collection_formats=None,
-                 _preload_content=True, _request_timeout=None, _host=None):
+                 _preload_content=True, _request_timeout=None, _host=None,
+                 _request_auth=None):
         """Makes the HTTP request (synchronous) and returns deserialized data.
 
         To make an async_req request, set the async_req parameter.
@@ -354,6 +358,10 @@ class ApiClient(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_token: dict, optional
         :return:
             If async_req parameter is True,
             the request will be called asynchronously.
@@ -367,7 +375,8 @@ class ApiClient(object):
                                    body, post_params, files,
                                    response_type, auth_settings,
                                    _return_http_data_only, collection_formats,
-                                   _preload_content, _request_timeout, _host)
+                                   _preload_content, _request_timeout, _host,
+                                   _request_auth)
 
         return self.pool.apply_async(self.__call_api, (resource_path,
                                                        method, path_params,
@@ -380,7 +389,7 @@ class ApiClient(object):
                                                        collection_formats,
                                                        _preload_content,
                                                        _request_timeout,
-                                                       _host))
+                                                       _host, _request_auth))
 
     def request(self, method, url, query_params=None, headers=None,
                 post_params=None, body=None, _preload_content=True,
@@ -527,29 +536,45 @@ class ApiClient(object):
         else:
             return content_types[0]
 
-    def update_params_for_auth(self, headers, querys, auth_settings):
+    def update_params_for_auth(self, headers, querys, auth_settings,
+                               request_auth=None):
         """Updates header and query params based on authentication setting.
 
         :param headers: Header parameters dict to be updated.
         :param querys: Query parameters tuple list to be updated.
         :param auth_settings: Authentication setting identifiers list.
+        :param request_auth: if set, the provided settings will
+                             override the token in the configuration.
         """
         if not auth_settings:
             return
 
+        if request_auth:
+            self._apply_auth_params(headers, querys, request_auth)
+            return
+
         for auth in auth_settings:
             auth_setting = self.configuration.auth_settings().get(auth)
             if auth_setting:
-                if auth_setting['in'] == 'cookie':
-                    headers['Cookie'] = auth_setting['value']
-                elif auth_setting['in'] == 'header':
-                    headers[auth_setting['key']] = auth_setting['value']
-                elif auth_setting['in'] == 'query':
-                    querys.append((auth_setting['key'], auth_setting['value']))
-                else:
-                    raise ApiValueError(
-                        'Authentication token must be in `query` or `header`'
-                    )
+                self._apply_auth_params(headers, querys, auth_setting)
+
+    def _apply_auth_params(self, headers, querys, auth_setting):
+        """Updates the request parameters based on a single auth_setting
+
+        :param headers: Header parameters dict to be updated.
+        :param querys: Query parameters tuple list to be updated.
+        :param auth_setting: auth settings for the endpoint
+        """
+        if auth_setting['in'] == 'cookie':
+            headers['Cookie'] = auth_setting['value']
+        elif auth_setting['in'] == 'header':
+            headers[auth_setting['key']] = auth_setting['value']
+        elif auth_setting['in'] == 'query':
+            querys.append((auth_setting['key'], auth_setting['value']))
+        else:
+            raise ApiValueError(
+                'Authentication token must be in `query` or `header`'
+            )
 
     def __deserialize_file(self, response):
         """Deserializes body to file
diff --git a/samples/client/petstore/python-tornado/petstore_api/api/another_fake_api.py b/samples/client/petstore/python-tornado/petstore_api/api/another_fake_api.py
index 4d69b287ca8b..562b9faa58f2 100644
--- a/samples/client/petstore/python-tornado/petstore_api/api/another_fake_api.py
+++ b/samples/client/petstore/python-tornado/petstore_api/api/another_fake_api.py
@@ -91,6 +91,10 @@ class AnotherFakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -107,7 +111,8 @@ class AnotherFakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -163,4 +168,5 @@ class AnotherFakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
diff --git a/samples/client/petstore/python-tornado/petstore_api/api/fake_api.py b/samples/client/petstore/python-tornado/petstore_api/api/fake_api.py
index 7789acf51c3d..b171fe8b3d7d 100644
--- a/samples/client/petstore/python-tornado/petstore_api/api/fake_api.py
+++ b/samples/client/petstore/python-tornado/petstore_api/api/fake_api.py
@@ -91,6 +91,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -107,7 +111,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -159,7 +164,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def fake_outer_boolean_serialize(self, **kwargs):  # noqa: E501
         """fake_outer_boolean_serialize  # noqa: E501
@@ -216,6 +222,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -232,7 +242,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -280,7 +291,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def fake_outer_composite_serialize(self, **kwargs):  # noqa: E501
         """fake_outer_composite_serialize  # noqa: E501
@@ -337,6 +349,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -353,7 +369,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -401,7 +418,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def fake_outer_number_serialize(self, **kwargs):  # noqa: E501
         """fake_outer_number_serialize  # noqa: E501
@@ -458,6 +476,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -474,7 +496,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -522,7 +545,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def fake_outer_string_serialize(self, **kwargs):  # noqa: E501
         """fake_outer_string_serialize  # noqa: E501
@@ -579,6 +603,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -595,7 +623,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -643,7 +672,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def test_body_with_file_schema(self, body, **kwargs):  # noqa: E501
         """test_body_with_file_schema  # noqa: E501
@@ -700,6 +730,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -716,7 +750,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -768,7 +803,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def test_body_with_query_params(self, query, body, **kwargs):  # noqa: E501
         """test_body_with_query_params  # noqa: E501
@@ -827,6 +863,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -844,7 +884,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -902,7 +943,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def test_client_model(self, body, **kwargs):  # noqa: E501
         """To test \"client\" model  # noqa: E501
@@ -959,6 +1001,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -975,7 +1021,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -1031,7 +1078,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def test_endpoint_parameters(self, number, double, pattern_without_delimiter, byte, **kwargs):  # noqa: E501
         """Fake endpoint for testing various parameters  假端點  偽のエンドポイント  가짜 엔드 포인트  # noqa: E501
@@ -1140,6 +1188,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -1169,7 +1221,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -1287,7 +1340,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def test_enum_parameters(self, **kwargs):  # noqa: E501
         """To test enum parameters  # noqa: E501
@@ -1372,6 +1426,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -1395,7 +1453,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -1460,7 +1519,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def test_group_parameters(self, required_string_group, required_boolean_group, required_int64_group, **kwargs):  # noqa: E501
         """Fake endpoint to test group parameters (optional)  # noqa: E501
@@ -1537,6 +1597,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -1558,7 +1622,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -1624,7 +1689,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def test_inline_additional_properties(self, param, **kwargs):  # noqa: E501
         """test inline additionalProperties  # noqa: E501
@@ -1679,6 +1745,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -1695,7 +1765,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -1747,7 +1818,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def test_json_form_data(self, param, param2, **kwargs):  # noqa: E501
         """test json serialization of form data  # noqa: E501
@@ -1806,6 +1878,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -1823,7 +1899,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -1881,7 +1958,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def test_query_parameter_collection_format(self, pipe, ioutil, http, url, context, **kwargs):  # noqa: E501
         """test_query_parameter_collection_format  # noqa: E501
@@ -1954,6 +2032,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -1974,7 +2056,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -2051,4 +2134,5 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
diff --git a/samples/client/petstore/python-tornado/petstore_api/api/fake_classname_tags_123_api.py b/samples/client/petstore/python-tornado/petstore_api/api/fake_classname_tags_123_api.py
index d963591a49a8..5cd445261491 100644
--- a/samples/client/petstore/python-tornado/petstore_api/api/fake_classname_tags_123_api.py
+++ b/samples/client/petstore/python-tornado/petstore_api/api/fake_classname_tags_123_api.py
@@ -91,6 +91,10 @@ class FakeClassnameTags123Api(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -107,7 +111,8 @@ class FakeClassnameTags123Api(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -163,4 +168,5 @@ class FakeClassnameTags123Api(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
diff --git a/samples/client/petstore/python-tornado/petstore_api/api/pet_api.py b/samples/client/petstore/python-tornado/petstore_api/api/pet_api.py
index 7002fe32740f..3119e2d60c45 100644
--- a/samples/client/petstore/python-tornado/petstore_api/api/pet_api.py
+++ b/samples/client/petstore/python-tornado/petstore_api/api/pet_api.py
@@ -89,6 +89,10 @@ class PetApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -105,7 +109,8 @@ class PetApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -157,7 +162,8 @@ class PetApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def delete_pet(self, pet_id, **kwargs):  # noqa: E501
         """Deletes a pet  # noqa: E501
@@ -216,6 +222,10 @@ class PetApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -233,7 +243,8 @@ class PetApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -283,7 +294,8 @@ class PetApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def find_pets_by_status(self, status, **kwargs):  # noqa: E501
         """Finds Pets by status  # noqa: E501
@@ -340,6 +352,10 @@ class PetApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -356,7 +372,8 @@ class PetApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -409,7 +426,8 @@ class PetApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def find_pets_by_tags(self, tags, **kwargs):  # noqa: E501
         """Finds Pets by tags  # noqa: E501
@@ -466,6 +484,10 @@ class PetApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -482,7 +504,8 @@ class PetApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -535,7 +558,8 @@ class PetApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def get_pet_by_id(self, pet_id, **kwargs):  # noqa: E501
         """Find pet by ID  # noqa: E501
@@ -592,6 +616,10 @@ class PetApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -608,7 +636,8 @@ class PetApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -660,7 +689,8 @@ class PetApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def update_pet(self, body, **kwargs):  # noqa: E501
         """Update an existing pet  # noqa: E501
@@ -715,6 +745,10 @@ class PetApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -731,7 +765,8 @@ class PetApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -783,7 +818,8 @@ class PetApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def update_pet_with_form(self, pet_id, **kwargs):  # noqa: E501
         """Updates a pet in the store with form data  # noqa: E501
@@ -846,6 +882,10 @@ class PetApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -864,7 +904,8 @@ class PetApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -920,7 +961,8 @@ class PetApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def upload_file(self, pet_id, **kwargs):  # noqa: E501
         """uploads an image  # noqa: E501
@@ -983,6 +1025,10 @@ class PetApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -1001,7 +1047,8 @@ class PetApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -1061,7 +1108,8 @@ class PetApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def upload_file_with_required_file(self, pet_id, required_file, **kwargs):  # noqa: E501
         """uploads an image (required)  # noqa: E501
@@ -1124,6 +1172,10 @@ class PetApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -1142,7 +1194,8 @@ class PetApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -1206,4 +1259,5 @@ class PetApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
diff --git a/samples/client/petstore/python-tornado/petstore_api/api/store_api.py b/samples/client/petstore/python-tornado/petstore_api/api/store_api.py
index 0ede23f05ba2..d2d4c3233341 100644
--- a/samples/client/petstore/python-tornado/petstore_api/api/store_api.py
+++ b/samples/client/petstore/python-tornado/petstore_api/api/store_api.py
@@ -91,6 +91,10 @@ class StoreApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -107,7 +111,8 @@ class StoreApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -155,7 +160,8 @@ class StoreApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def get_inventory(self, **kwargs):  # noqa: E501
         """Returns pet inventories by status  # noqa: E501
@@ -208,6 +214,10 @@ class StoreApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -223,7 +233,8 @@ class StoreApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -269,7 +280,8 @@ class StoreApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def get_order_by_id(self, order_id, **kwargs):  # noqa: E501
         """Find purchase order by ID  # noqa: E501
@@ -326,6 +338,10 @@ class StoreApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -342,7 +358,8 @@ class StoreApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -398,7 +415,8 @@ class StoreApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def place_order(self, body, **kwargs):  # noqa: E501
         """Place an order for a pet  # noqa: E501
@@ -453,6 +471,10 @@ class StoreApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -469,7 +491,8 @@ class StoreApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -521,4 +544,5 @@ class StoreApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
diff --git a/samples/client/petstore/python-tornado/petstore_api/api/user_api.py b/samples/client/petstore/python-tornado/petstore_api/api/user_api.py
index a912483b023b..9504f2834a6b 100644
--- a/samples/client/petstore/python-tornado/petstore_api/api/user_api.py
+++ b/samples/client/petstore/python-tornado/petstore_api/api/user_api.py
@@ -91,6 +91,10 @@ class UserApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -107,7 +111,8 @@ class UserApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -155,7 +160,8 @@ class UserApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def create_users_with_array_input(self, body, **kwargs):  # noqa: E501
         """Creates list of users with given input array  # noqa: E501
@@ -210,6 +216,10 @@ class UserApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -226,7 +236,8 @@ class UserApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -274,7 +285,8 @@ class UserApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def create_users_with_list_input(self, body, **kwargs):  # noqa: E501
         """Creates list of users with given input array  # noqa: E501
@@ -329,6 +341,10 @@ class UserApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -345,7 +361,8 @@ class UserApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -393,7 +410,8 @@ class UserApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def delete_user(self, username, **kwargs):  # noqa: E501
         """Delete user  # noqa: E501
@@ -450,6 +468,10 @@ class UserApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -466,7 +488,8 @@ class UserApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -514,7 +537,8 @@ class UserApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def get_user_by_name(self, username, **kwargs):  # noqa: E501
         """Get user by user name  # noqa: E501
@@ -569,6 +593,10 @@ class UserApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -585,7 +613,8 @@ class UserApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -637,7 +666,8 @@ class UserApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def login_user(self, username, password, **kwargs):  # noqa: E501
         """Logs user into the system  # noqa: E501
@@ -696,6 +726,10 @@ class UserApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -713,7 +747,8 @@ class UserApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -771,7 +806,8 @@ class UserApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def logout_user(self, **kwargs):  # noqa: E501
         """Logs out current logged in user session  # noqa: E501
@@ -822,6 +858,10 @@ class UserApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -837,7 +877,8 @@ class UserApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -879,7 +920,8 @@ class UserApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def update_user(self, username, body, **kwargs):  # noqa: E501
         """Updated user  # noqa: E501
@@ -940,6 +982,10 @@ class UserApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -957,7 +1003,8 @@ class UserApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -1011,4 +1058,5 @@ class UserApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
diff --git a/samples/client/petstore/python-tornado/petstore_api/api_client.py b/samples/client/petstore/python-tornado/petstore_api/api_client.py
index 3fc10d72ab50..7782745e5096 100644
--- a/samples/client/petstore/python-tornado/petstore_api/api_client.py
+++ b/samples/client/petstore/python-tornado/petstore_api/api_client.py
@@ -124,7 +124,8 @@ class ApiClient(object):
             query_params=None, header_params=None, body=None, post_params=None,
             files=None, response_type=None, auth_settings=None,
             _return_http_data_only=None, collection_formats=None,
-            _preload_content=True, _request_timeout=None, _host=None):
+            _preload_content=True, _request_timeout=None, _host=None,
+            _request_auth=None):
 
         config = self.configuration
 
@@ -165,7 +166,9 @@ class ApiClient(object):
             post_params.extend(self.files_parameters(files))
 
         # auth setting
-        self.update_params_for_auth(header_params, query_params, auth_settings)
+        self.update_params_for_auth(
+            header_params, query_params, auth_settings,
+            request_auth=_request_auth)
 
         # body
         if body:
@@ -325,7 +328,8 @@ class ApiClient(object):
                  body=None, post_params=None, files=None,
                  response_type=None, auth_settings=None, async_req=None,
                  _return_http_data_only=None, collection_formats=None,
-                 _preload_content=True, _request_timeout=None, _host=None):
+                 _preload_content=True, _request_timeout=None, _host=None,
+                 _request_auth=None):
         """Makes the HTTP request (synchronous) and returns deserialized data.
 
         To make an async_req request, set the async_req parameter.
@@ -355,6 +359,10 @@ class ApiClient(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_token: dict, optional
         :return:
             If async_req parameter is True,
             the request will be called asynchronously.
@@ -368,7 +376,8 @@ class ApiClient(object):
                                    body, post_params, files,
                                    response_type, auth_settings,
                                    _return_http_data_only, collection_formats,
-                                   _preload_content, _request_timeout, _host)
+                                   _preload_content, _request_timeout, _host,
+                                   _request_auth)
 
         return self.pool.apply_async(self.__call_api, (resource_path,
                                                        method, path_params,
@@ -381,7 +390,7 @@ class ApiClient(object):
                                                        collection_formats,
                                                        _preload_content,
                                                        _request_timeout,
-                                                       _host))
+                                                       _host, _request_auth))
 
     def request(self, method, url, query_params=None, headers=None,
                 post_params=None, body=None, _preload_content=True,
@@ -528,29 +537,45 @@ class ApiClient(object):
         else:
             return content_types[0]
 
-    def update_params_for_auth(self, headers, querys, auth_settings):
+    def update_params_for_auth(self, headers, querys, auth_settings,
+                               request_auth=None):
         """Updates header and query params based on authentication setting.
 
         :param headers: Header parameters dict to be updated.
         :param querys: Query parameters tuple list to be updated.
         :param auth_settings: Authentication setting identifiers list.
+        :param request_auth: if set, the provided settings will
+                             override the token in the configuration.
         """
         if not auth_settings:
             return
 
+        if request_auth:
+            self._apply_auth_params(headers, querys, request_auth)
+            return
+
         for auth in auth_settings:
             auth_setting = self.configuration.auth_settings().get(auth)
             if auth_setting:
-                if auth_setting['in'] == 'cookie':
-                    headers['Cookie'] = auth_setting['value']
-                elif auth_setting['in'] == 'header':
-                    headers[auth_setting['key']] = auth_setting['value']
-                elif auth_setting['in'] == 'query':
-                    querys.append((auth_setting['key'], auth_setting['value']))
-                else:
-                    raise ApiValueError(
-                        'Authentication token must be in `query` or `header`'
-                    )
+                self._apply_auth_params(headers, querys, auth_setting)
+
+    def _apply_auth_params(self, headers, querys, auth_setting):
+        """Updates the request parameters based on a single auth_setting
+
+        :param headers: Header parameters dict to be updated.
+        :param querys: Query parameters tuple list to be updated.
+        :param auth_setting: auth settings for the endpoint
+        """
+        if auth_setting['in'] == 'cookie':
+            headers['Cookie'] = auth_setting['value']
+        elif auth_setting['in'] == 'header':
+            headers[auth_setting['key']] = auth_setting['value']
+        elif auth_setting['in'] == 'query':
+            querys.append((auth_setting['key'], auth_setting['value']))
+        else:
+            raise ApiValueError(
+                'Authentication token must be in `query` or `header`'
+            )
 
     def __deserialize_file(self, response):
         """Deserializes body to file
diff --git a/samples/client/petstore/python/petstore_api/api/another_fake_api.py b/samples/client/petstore/python/petstore_api/api/another_fake_api.py
index 4d69b287ca8b..562b9faa58f2 100644
--- a/samples/client/petstore/python/petstore_api/api/another_fake_api.py
+++ b/samples/client/petstore/python/petstore_api/api/another_fake_api.py
@@ -91,6 +91,10 @@ class AnotherFakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -107,7 +111,8 @@ class AnotherFakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -163,4 +168,5 @@ class AnotherFakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
diff --git a/samples/client/petstore/python/petstore_api/api/fake_api.py b/samples/client/petstore/python/petstore_api/api/fake_api.py
index 7789acf51c3d..b171fe8b3d7d 100644
--- a/samples/client/petstore/python/petstore_api/api/fake_api.py
+++ b/samples/client/petstore/python/petstore_api/api/fake_api.py
@@ -91,6 +91,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -107,7 +111,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -159,7 +164,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def fake_outer_boolean_serialize(self, **kwargs):  # noqa: E501
         """fake_outer_boolean_serialize  # noqa: E501
@@ -216,6 +222,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -232,7 +242,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -280,7 +291,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def fake_outer_composite_serialize(self, **kwargs):  # noqa: E501
         """fake_outer_composite_serialize  # noqa: E501
@@ -337,6 +349,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -353,7 +369,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -401,7 +418,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def fake_outer_number_serialize(self, **kwargs):  # noqa: E501
         """fake_outer_number_serialize  # noqa: E501
@@ -458,6 +476,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -474,7 +496,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -522,7 +545,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def fake_outer_string_serialize(self, **kwargs):  # noqa: E501
         """fake_outer_string_serialize  # noqa: E501
@@ -579,6 +603,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -595,7 +623,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -643,7 +672,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def test_body_with_file_schema(self, body, **kwargs):  # noqa: E501
         """test_body_with_file_schema  # noqa: E501
@@ -700,6 +730,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -716,7 +750,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -768,7 +803,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def test_body_with_query_params(self, query, body, **kwargs):  # noqa: E501
         """test_body_with_query_params  # noqa: E501
@@ -827,6 +863,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -844,7 +884,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -902,7 +943,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def test_client_model(self, body, **kwargs):  # noqa: E501
         """To test \"client\" model  # noqa: E501
@@ -959,6 +1001,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -975,7 +1021,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -1031,7 +1078,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def test_endpoint_parameters(self, number, double, pattern_without_delimiter, byte, **kwargs):  # noqa: E501
         """Fake endpoint for testing various parameters  假端點  偽のエンドポイント  가짜 엔드 포인트  # noqa: E501
@@ -1140,6 +1188,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -1169,7 +1221,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -1287,7 +1340,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def test_enum_parameters(self, **kwargs):  # noqa: E501
         """To test enum parameters  # noqa: E501
@@ -1372,6 +1426,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -1395,7 +1453,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -1460,7 +1519,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def test_group_parameters(self, required_string_group, required_boolean_group, required_int64_group, **kwargs):  # noqa: E501
         """Fake endpoint to test group parameters (optional)  # noqa: E501
@@ -1537,6 +1597,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -1558,7 +1622,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -1624,7 +1689,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def test_inline_additional_properties(self, param, **kwargs):  # noqa: E501
         """test inline additionalProperties  # noqa: E501
@@ -1679,6 +1745,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -1695,7 +1765,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -1747,7 +1818,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def test_json_form_data(self, param, param2, **kwargs):  # noqa: E501
         """test json serialization of form data  # noqa: E501
@@ -1806,6 +1878,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -1823,7 +1899,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -1881,7 +1958,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def test_query_parameter_collection_format(self, pipe, ioutil, http, url, context, **kwargs):  # noqa: E501
         """test_query_parameter_collection_format  # noqa: E501
@@ -1954,6 +2032,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -1974,7 +2056,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -2051,4 +2134,5 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
diff --git a/samples/client/petstore/python/petstore_api/api/fake_classname_tags_123_api.py b/samples/client/petstore/python/petstore_api/api/fake_classname_tags_123_api.py
index d963591a49a8..5cd445261491 100644
--- a/samples/client/petstore/python/petstore_api/api/fake_classname_tags_123_api.py
+++ b/samples/client/petstore/python/petstore_api/api/fake_classname_tags_123_api.py
@@ -91,6 +91,10 @@ class FakeClassnameTags123Api(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -107,7 +111,8 @@ class FakeClassnameTags123Api(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -163,4 +168,5 @@ class FakeClassnameTags123Api(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
diff --git a/samples/client/petstore/python/petstore_api/api/pet_api.py b/samples/client/petstore/python/petstore_api/api/pet_api.py
index 7002fe32740f..3119e2d60c45 100644
--- a/samples/client/petstore/python/petstore_api/api/pet_api.py
+++ b/samples/client/petstore/python/petstore_api/api/pet_api.py
@@ -89,6 +89,10 @@ class PetApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -105,7 +109,8 @@ class PetApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -157,7 +162,8 @@ class PetApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def delete_pet(self, pet_id, **kwargs):  # noqa: E501
         """Deletes a pet  # noqa: E501
@@ -216,6 +222,10 @@ class PetApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -233,7 +243,8 @@ class PetApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -283,7 +294,8 @@ class PetApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def find_pets_by_status(self, status, **kwargs):  # noqa: E501
         """Finds Pets by status  # noqa: E501
@@ -340,6 +352,10 @@ class PetApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -356,7 +372,8 @@ class PetApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -409,7 +426,8 @@ class PetApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def find_pets_by_tags(self, tags, **kwargs):  # noqa: E501
         """Finds Pets by tags  # noqa: E501
@@ -466,6 +484,10 @@ class PetApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -482,7 +504,8 @@ class PetApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -535,7 +558,8 @@ class PetApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def get_pet_by_id(self, pet_id, **kwargs):  # noqa: E501
         """Find pet by ID  # noqa: E501
@@ -592,6 +616,10 @@ class PetApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -608,7 +636,8 @@ class PetApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -660,7 +689,8 @@ class PetApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def update_pet(self, body, **kwargs):  # noqa: E501
         """Update an existing pet  # noqa: E501
@@ -715,6 +745,10 @@ class PetApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -731,7 +765,8 @@ class PetApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -783,7 +818,8 @@ class PetApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def update_pet_with_form(self, pet_id, **kwargs):  # noqa: E501
         """Updates a pet in the store with form data  # noqa: E501
@@ -846,6 +882,10 @@ class PetApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -864,7 +904,8 @@ class PetApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -920,7 +961,8 @@ class PetApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def upload_file(self, pet_id, **kwargs):  # noqa: E501
         """uploads an image  # noqa: E501
@@ -983,6 +1025,10 @@ class PetApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -1001,7 +1047,8 @@ class PetApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -1061,7 +1108,8 @@ class PetApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def upload_file_with_required_file(self, pet_id, required_file, **kwargs):  # noqa: E501
         """uploads an image (required)  # noqa: E501
@@ -1124,6 +1172,10 @@ class PetApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -1142,7 +1194,8 @@ class PetApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -1206,4 +1259,5 @@ class PetApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
diff --git a/samples/client/petstore/python/petstore_api/api/store_api.py b/samples/client/petstore/python/petstore_api/api/store_api.py
index 0ede23f05ba2..d2d4c3233341 100644
--- a/samples/client/petstore/python/petstore_api/api/store_api.py
+++ b/samples/client/petstore/python/petstore_api/api/store_api.py
@@ -91,6 +91,10 @@ class StoreApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -107,7 +111,8 @@ class StoreApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -155,7 +160,8 @@ class StoreApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def get_inventory(self, **kwargs):  # noqa: E501
         """Returns pet inventories by status  # noqa: E501
@@ -208,6 +214,10 @@ class StoreApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -223,7 +233,8 @@ class StoreApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -269,7 +280,8 @@ class StoreApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def get_order_by_id(self, order_id, **kwargs):  # noqa: E501
         """Find purchase order by ID  # noqa: E501
@@ -326,6 +338,10 @@ class StoreApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -342,7 +358,8 @@ class StoreApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -398,7 +415,8 @@ class StoreApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def place_order(self, body, **kwargs):  # noqa: E501
         """Place an order for a pet  # noqa: E501
@@ -453,6 +471,10 @@ class StoreApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -469,7 +491,8 @@ class StoreApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -521,4 +544,5 @@ class StoreApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
diff --git a/samples/client/petstore/python/petstore_api/api/user_api.py b/samples/client/petstore/python/petstore_api/api/user_api.py
index a912483b023b..9504f2834a6b 100644
--- a/samples/client/petstore/python/petstore_api/api/user_api.py
+++ b/samples/client/petstore/python/petstore_api/api/user_api.py
@@ -91,6 +91,10 @@ class UserApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -107,7 +111,8 @@ class UserApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -155,7 +160,8 @@ class UserApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def create_users_with_array_input(self, body, **kwargs):  # noqa: E501
         """Creates list of users with given input array  # noqa: E501
@@ -210,6 +216,10 @@ class UserApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -226,7 +236,8 @@ class UserApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -274,7 +285,8 @@ class UserApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def create_users_with_list_input(self, body, **kwargs):  # noqa: E501
         """Creates list of users with given input array  # noqa: E501
@@ -329,6 +341,10 @@ class UserApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -345,7 +361,8 @@ class UserApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -393,7 +410,8 @@ class UserApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def delete_user(self, username, **kwargs):  # noqa: E501
         """Delete user  # noqa: E501
@@ -450,6 +468,10 @@ class UserApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -466,7 +488,8 @@ class UserApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -514,7 +537,8 @@ class UserApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def get_user_by_name(self, username, **kwargs):  # noqa: E501
         """Get user by user name  # noqa: E501
@@ -569,6 +593,10 @@ class UserApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -585,7 +613,8 @@ class UserApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -637,7 +666,8 @@ class UserApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def login_user(self, username, password, **kwargs):  # noqa: E501
         """Logs user into the system  # noqa: E501
@@ -696,6 +726,10 @@ class UserApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -713,7 +747,8 @@ class UserApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -771,7 +806,8 @@ class UserApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def logout_user(self, **kwargs):  # noqa: E501
         """Logs out current logged in user session  # noqa: E501
@@ -822,6 +858,10 @@ class UserApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -837,7 +877,8 @@ class UserApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -879,7 +920,8 @@ class UserApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def update_user(self, username, body, **kwargs):  # noqa: E501
         """Updated user  # noqa: E501
@@ -940,6 +982,10 @@ class UserApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -957,7 +1003,8 @@ class UserApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -1011,4 +1058,5 @@ class UserApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
diff --git a/samples/client/petstore/python/petstore_api/api_client.py b/samples/client/petstore/python/petstore_api/api_client.py
index 7b1b0010a49a..80dbae6b7b8f 100644
--- a/samples/client/petstore/python/petstore_api/api_client.py
+++ b/samples/client/petstore/python/petstore_api/api_client.py
@@ -122,7 +122,8 @@ class ApiClient(object):
             query_params=None, header_params=None, body=None, post_params=None,
             files=None, response_type=None, auth_settings=None,
             _return_http_data_only=None, collection_formats=None,
-            _preload_content=True, _request_timeout=None, _host=None):
+            _preload_content=True, _request_timeout=None, _host=None,
+            _request_auth=None):
 
         config = self.configuration
 
@@ -163,7 +164,9 @@ class ApiClient(object):
             post_params.extend(self.files_parameters(files))
 
         # auth setting
-        self.update_params_for_auth(header_params, query_params, auth_settings)
+        self.update_params_for_auth(
+            header_params, query_params, auth_settings,
+            request_auth=_request_auth)
 
         # body
         if body:
@@ -323,7 +326,8 @@ class ApiClient(object):
                  body=None, post_params=None, files=None,
                  response_type=None, auth_settings=None, async_req=None,
                  _return_http_data_only=None, collection_formats=None,
-                 _preload_content=True, _request_timeout=None, _host=None):
+                 _preload_content=True, _request_timeout=None, _host=None,
+                 _request_auth=None):
         """Makes the HTTP request (synchronous) and returns deserialized data.
 
         To make an async_req request, set the async_req parameter.
@@ -353,6 +357,10 @@ class ApiClient(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_token: dict, optional
         :return:
             If async_req parameter is True,
             the request will be called asynchronously.
@@ -366,7 +374,8 @@ class ApiClient(object):
                                    body, post_params, files,
                                    response_type, auth_settings,
                                    _return_http_data_only, collection_formats,
-                                   _preload_content, _request_timeout, _host)
+                                   _preload_content, _request_timeout, _host,
+                                   _request_auth)
 
         return self.pool.apply_async(self.__call_api, (resource_path,
                                                        method, path_params,
@@ -379,7 +388,7 @@ class ApiClient(object):
                                                        collection_formats,
                                                        _preload_content,
                                                        _request_timeout,
-                                                       _host))
+                                                       _host, _request_auth))
 
     def request(self, method, url, query_params=None, headers=None,
                 post_params=None, body=None, _preload_content=True,
@@ -526,29 +535,45 @@ class ApiClient(object):
         else:
             return content_types[0]
 
-    def update_params_for_auth(self, headers, querys, auth_settings):
+    def update_params_for_auth(self, headers, querys, auth_settings,
+                               request_auth=None):
         """Updates header and query params based on authentication setting.
 
         :param headers: Header parameters dict to be updated.
         :param querys: Query parameters tuple list to be updated.
         :param auth_settings: Authentication setting identifiers list.
+        :param request_auth: if set, the provided settings will
+                             override the token in the configuration.
         """
         if not auth_settings:
             return
 
+        if request_auth:
+            self._apply_auth_params(headers, querys, request_auth)
+            return
+
         for auth in auth_settings:
             auth_setting = self.configuration.auth_settings().get(auth)
             if auth_setting:
-                if auth_setting['in'] == 'cookie':
-                    headers['Cookie'] = auth_setting['value']
-                elif auth_setting['in'] == 'header':
-                    headers[auth_setting['key']] = auth_setting['value']
-                elif auth_setting['in'] == 'query':
-                    querys.append((auth_setting['key'], auth_setting['value']))
-                else:
-                    raise ApiValueError(
-                        'Authentication token must be in `query` or `header`'
-                    )
+                self._apply_auth_params(headers, querys, auth_setting)
+
+    def _apply_auth_params(self, headers, querys, auth_setting):
+        """Updates the request parameters based on a single auth_setting
+
+        :param headers: Header parameters dict to be updated.
+        :param querys: Query parameters tuple list to be updated.
+        :param auth_setting: auth settings for the endpoint
+        """
+        if auth_setting['in'] == 'cookie':
+            headers['Cookie'] = auth_setting['value']
+        elif auth_setting['in'] == 'header':
+            headers[auth_setting['key']] = auth_setting['value']
+        elif auth_setting['in'] == 'query':
+            querys.append((auth_setting['key'], auth_setting['value']))
+        else:
+            raise ApiValueError(
+                'Authentication token must be in `query` or `header`'
+            )
 
     def __deserialize_file(self, response):
         """Deserializes body to file
diff --git a/samples/client/petstore/python/tests/test_pet_api.py b/samples/client/petstore/python/tests/test_pet_api.py
index 500505735efa..a7b47bdc5670 100644
--- a/samples/client/petstore/python/tests/test_pet_api.py
+++ b/samples/client/petstore/python/tests/test_pet_api.py
@@ -121,6 +121,30 @@ class PetApiTests(unittest.TestCase):
         self.pet_api.add_pet(self.pet, _request_timeout=5)
         self.pet_api.add_pet(self.pet, _request_timeout=(1, 2))
 
+    def test_auth_settings(self):
+        mock_pool = MockPoolManager(self)
+        self.api_client.rest_client.pool_manager = mock_pool
+
+        mock_pool.expect_request('POST', HOST + '/pet',
+                                 body=json.dumps(self.api_client.sanitize_for_serialization(self.pet)),
+                                 headers={'Content-Type': 'application/json',
+                                          'Authorization': 'Bearer ACCESS_TOKEN',
+                                          'User-Agent': 'OpenAPI-Generator/1.0.0/python'},
+                                 preload_content=True, timeout=None)
+        mock_pool.expect_request('POST', HOST + '/pet',
+                                 body=json.dumps(self.api_client.sanitize_for_serialization(self.pet)),
+                                 headers={'Content-Type': 'application/json',
+                                          'Authorization': 'Prefix ANOTHER_TOKEN',
+                                          'User-Agent': 'OpenAPI-Generator/1.0.0/python'},
+                                 preload_content=True, timeout=None)
+
+        self.pet_api.add_pet(self.pet, _request_auth=None)
+        self.pet_api.add_pet(self.pet, _request_auth={
+            'in': 'header',
+            'key': 'Authorization',
+            'value': 'Prefix ANOTHER_TOKEN'
+        })
+
     def test_separate_default_client_instances(self):
         pet_api = petstore_api.PetApi()
         pet_api2 = petstore_api.PetApi()
diff --git a/samples/openapi3/client/petstore/python/petstore_api/api/another_fake_api.py b/samples/openapi3/client/petstore/python/petstore_api/api/another_fake_api.py
index 9421b337d4bf..ffb18035db5e 100644
--- a/samples/openapi3/client/petstore/python/petstore_api/api/another_fake_api.py
+++ b/samples/openapi3/client/petstore/python/petstore_api/api/another_fake_api.py
@@ -91,6 +91,10 @@ class AnotherFakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -107,7 +111,8 @@ class AnotherFakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -163,4 +168,5 @@ class AnotherFakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
diff --git a/samples/openapi3/client/petstore/python/petstore_api/api/default_api.py b/samples/openapi3/client/petstore/python/petstore_api/api/default_api.py
index a14b43c994ce..73fa98052752 100644
--- a/samples/openapi3/client/petstore/python/petstore_api/api/default_api.py
+++ b/samples/openapi3/client/petstore/python/petstore_api/api/default_api.py
@@ -85,6 +85,10 @@ class DefaultApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -100,7 +104,8 @@ class DefaultApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -146,4 +151,5 @@ class DefaultApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
diff --git a/samples/openapi3/client/petstore/python/petstore_api/api/fake_api.py b/samples/openapi3/client/petstore/python/petstore_api/api/fake_api.py
index 6fe97f5b5cee..b484f561d5f3 100644
--- a/samples/openapi3/client/petstore/python/petstore_api/api/fake_api.py
+++ b/samples/openapi3/client/petstore/python/petstore_api/api/fake_api.py
@@ -85,6 +85,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -100,7 +104,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -146,7 +151,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def fake_http_signature_test(self, pet, **kwargs):  # noqa: E501
         """test http signature authentication  # noqa: E501
@@ -209,6 +215,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -227,7 +237,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -283,7 +294,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def fake_outer_boolean_serialize(self, **kwargs):  # noqa: E501
         """fake_outer_boolean_serialize  # noqa: E501
@@ -340,6 +352,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -356,7 +372,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -408,7 +425,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def fake_outer_composite_serialize(self, **kwargs):  # noqa: E501
         """fake_outer_composite_serialize  # noqa: E501
@@ -465,6 +483,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -481,7 +503,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -533,7 +556,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def fake_outer_number_serialize(self, **kwargs):  # noqa: E501
         """fake_outer_number_serialize  # noqa: E501
@@ -590,6 +614,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -606,7 +634,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -658,7 +687,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def fake_outer_string_serialize(self, **kwargs):  # noqa: E501
         """fake_outer_string_serialize  # noqa: E501
@@ -715,6 +745,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -731,7 +765,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -783,7 +818,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def test_body_with_file_schema(self, file_schema_test_class, **kwargs):  # noqa: E501
         """test_body_with_file_schema  # noqa: E501
@@ -840,6 +876,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -856,7 +896,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -908,7 +949,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def test_body_with_query_params(self, query, user, **kwargs):  # noqa: E501
         """test_body_with_query_params  # noqa: E501
@@ -967,6 +1009,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -984,7 +1030,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -1042,7 +1089,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def test_client_model(self, client, **kwargs):  # noqa: E501
         """To test \"client\" model  # noqa: E501
@@ -1099,6 +1147,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -1115,7 +1167,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -1171,7 +1224,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def test_endpoint_parameters(self, number, double, pattern_without_delimiter, byte, **kwargs):  # noqa: E501
         """Fake endpoint for testing various parameters 假端點 偽のエンドポイント 가짜 엔드 포인트   # noqa: E501
@@ -1280,6 +1334,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -1309,7 +1367,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -1427,7 +1486,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def test_enum_parameters(self, **kwargs):  # noqa: E501
         """To test enum parameters  # noqa: E501
@@ -1512,6 +1572,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -1535,7 +1599,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -1600,7 +1665,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def test_group_parameters(self, required_string_group, required_boolean_group, required_int64_group, **kwargs):  # noqa: E501
         """Fake endpoint to test group parameters (optional)  # noqa: E501
@@ -1677,6 +1743,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -1698,7 +1768,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -1764,7 +1835,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def test_inline_additional_properties(self, request_body, **kwargs):  # noqa: E501
         """test inline additionalProperties  # noqa: E501
@@ -1819,6 +1891,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -1835,7 +1911,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -1887,7 +1964,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def test_json_form_data(self, param, param2, **kwargs):  # noqa: E501
         """test json serialization of form data  # noqa: E501
@@ -1946,6 +2024,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -1963,7 +2045,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -2021,7 +2104,8 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def test_query_parameter_collection_format(self, pipe, ioutil, http, url, context, **kwargs):  # noqa: E501
         """test_query_parameter_collection_format  # noqa: E501
@@ -2094,6 +2178,10 @@ class FakeApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -2114,7 +2202,8 @@ class FakeApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -2191,4 +2280,5 @@ class FakeApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
diff --git a/samples/openapi3/client/petstore/python/petstore_api/api/fake_classname_tags_123_api.py b/samples/openapi3/client/petstore/python/petstore_api/api/fake_classname_tags_123_api.py
index 19d22cd10d65..9295236c5691 100644
--- a/samples/openapi3/client/petstore/python/petstore_api/api/fake_classname_tags_123_api.py
+++ b/samples/openapi3/client/petstore/python/petstore_api/api/fake_classname_tags_123_api.py
@@ -91,6 +91,10 @@ class FakeClassnameTags123Api(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -107,7 +111,8 @@ class FakeClassnameTags123Api(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -163,4 +168,5 @@ class FakeClassnameTags123Api(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
diff --git a/samples/openapi3/client/petstore/python/petstore_api/api/pet_api.py b/samples/openapi3/client/petstore/python/petstore_api/api/pet_api.py
index 8c8f5d936719..468267e78729 100644
--- a/samples/openapi3/client/petstore/python/petstore_api/api/pet_api.py
+++ b/samples/openapi3/client/petstore/python/petstore_api/api/pet_api.py
@@ -89,6 +89,10 @@ class PetApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -118,7 +122,8 @@ class PetApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -171,7 +176,8 @@ class PetApi(object):
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
             _host=local_var_host,
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def delete_pet(self, pet_id, **kwargs):  # noqa: E501
         """Deletes a pet  # noqa: E501
@@ -230,6 +236,10 @@ class PetApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -247,7 +257,8 @@ class PetApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -297,7 +308,8 @@ class PetApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def find_pets_by_status(self, status, **kwargs):  # noqa: E501
         """Finds Pets by status  # noqa: E501
@@ -354,6 +366,10 @@ class PetApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -370,7 +386,8 @@ class PetApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -423,7 +440,8 @@ class PetApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def find_pets_by_tags(self, tags, **kwargs):  # noqa: E501
         """Finds Pets by tags  # noqa: E501
@@ -480,6 +498,10 @@ class PetApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -496,7 +518,8 @@ class PetApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -549,7 +572,8 @@ class PetApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def get_pet_by_id(self, pet_id, **kwargs):  # noqa: E501
         """Find pet by ID  # noqa: E501
@@ -606,6 +630,10 @@ class PetApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -622,7 +650,8 @@ class PetApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -674,7 +703,8 @@ class PetApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def update_pet(self, pet, **kwargs):  # noqa: E501
         """Update an existing pet  # noqa: E501
@@ -729,6 +759,10 @@ class PetApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -758,7 +792,8 @@ class PetApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -811,7 +846,8 @@ class PetApi(object):
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
             _host=local_var_host,
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def update_pet_with_form(self, pet_id, **kwargs):  # noqa: E501
         """Updates a pet in the store with form data  # noqa: E501
@@ -874,6 +910,10 @@ class PetApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -892,7 +932,8 @@ class PetApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -948,7 +989,8 @@ class PetApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def upload_file(self, pet_id, **kwargs):  # noqa: E501
         """uploads an image  # noqa: E501
@@ -1011,6 +1053,10 @@ class PetApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -1029,7 +1075,8 @@ class PetApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -1089,7 +1136,8 @@ class PetApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def upload_file_with_required_file(self, pet_id, required_file, **kwargs):  # noqa: E501
         """uploads an image (required)  # noqa: E501
@@ -1152,6 +1200,10 @@ class PetApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -1170,7 +1222,8 @@ class PetApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -1234,4 +1287,5 @@ class PetApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
diff --git a/samples/openapi3/client/petstore/python/petstore_api/api/store_api.py b/samples/openapi3/client/petstore/python/petstore_api/api/store_api.py
index 2b35556ba815..ea01f1b53ffb 100644
--- a/samples/openapi3/client/petstore/python/petstore_api/api/store_api.py
+++ b/samples/openapi3/client/petstore/python/petstore_api/api/store_api.py
@@ -91,6 +91,10 @@ class StoreApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -107,7 +111,8 @@ class StoreApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -155,7 +160,8 @@ class StoreApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def get_inventory(self, **kwargs):  # noqa: E501
         """Returns pet inventories by status  # noqa: E501
@@ -208,6 +214,10 @@ class StoreApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -223,7 +233,8 @@ class StoreApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -269,7 +280,8 @@ class StoreApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def get_order_by_id(self, order_id, **kwargs):  # noqa: E501
         """Find purchase order by ID  # noqa: E501
@@ -326,6 +338,10 @@ class StoreApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -342,7 +358,8 @@ class StoreApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -398,7 +415,8 @@ class StoreApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def place_order(self, order, **kwargs):  # noqa: E501
         """Place an order for a pet  # noqa: E501
@@ -453,6 +471,10 @@ class StoreApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -469,7 +491,8 @@ class StoreApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -525,4 +548,5 @@ class StoreApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
diff --git a/samples/openapi3/client/petstore/python/petstore_api/api/user_api.py b/samples/openapi3/client/petstore/python/petstore_api/api/user_api.py
index 38d0b4ee5b9f..d0c057dba195 100644
--- a/samples/openapi3/client/petstore/python/petstore_api/api/user_api.py
+++ b/samples/openapi3/client/petstore/python/petstore_api/api/user_api.py
@@ -91,6 +91,10 @@ class UserApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -107,7 +111,8 @@ class UserApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -159,7 +164,8 @@ class UserApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def create_users_with_array_input(self, user, **kwargs):  # noqa: E501
         """Creates list of users with given input array  # noqa: E501
@@ -214,6 +220,10 @@ class UserApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -230,7 +240,8 @@ class UserApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -282,7 +293,8 @@ class UserApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def create_users_with_list_input(self, user, **kwargs):  # noqa: E501
         """Creates list of users with given input array  # noqa: E501
@@ -337,6 +349,10 @@ class UserApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -353,7 +369,8 @@ class UserApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -405,7 +422,8 @@ class UserApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def delete_user(self, username, **kwargs):  # noqa: E501
         """Delete user  # noqa: E501
@@ -462,6 +480,10 @@ class UserApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -478,7 +500,8 @@ class UserApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -526,7 +549,8 @@ class UserApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def get_user_by_name(self, username, **kwargs):  # noqa: E501
         """Get user by user name  # noqa: E501
@@ -581,6 +605,10 @@ class UserApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -597,7 +625,8 @@ class UserApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -649,7 +678,8 @@ class UserApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def login_user(self, username, password, **kwargs):  # noqa: E501
         """Logs user into the system  # noqa: E501
@@ -708,6 +738,10 @@ class UserApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -725,7 +759,8 @@ class UserApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -783,7 +818,8 @@ class UserApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def logout_user(self, **kwargs):  # noqa: E501
         """Logs out current logged in user session  # noqa: E501
@@ -834,6 +870,10 @@ class UserApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -849,7 +889,8 @@ class UserApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -891,7 +932,8 @@ class UserApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
 
     def update_user(self, username, user, **kwargs):  # noqa: E501
         """Updated user  # noqa: E501
@@ -952,6 +994,10 @@ class UserApi(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_auth: dict, optional
         :return: Returns the result object.
                  If the method is called asynchronously,
                  returns the request thread.
@@ -969,7 +1015,8 @@ class UserApi(object):
                 'async_req',
                 '_return_http_data_only',
                 '_preload_content',
-                '_request_timeout'
+                '_request_timeout',
+                '_request_auth'
             ]
         )
 
@@ -1027,4 +1074,5 @@ class UserApi(object):
             _return_http_data_only=local_var_params.get('_return_http_data_only'),  # noqa: E501
             _preload_content=local_var_params.get('_preload_content', True),
             _request_timeout=local_var_params.get('_request_timeout'),
-            collection_formats=collection_formats)
+            collection_formats=collection_formats,
+            _request_auth=local_var_params.get('_request_auth'))
diff --git a/samples/openapi3/client/petstore/python/petstore_api/api_client.py b/samples/openapi3/client/petstore/python/petstore_api/api_client.py
index 7b1b0010a49a..80dbae6b7b8f 100644
--- a/samples/openapi3/client/petstore/python/petstore_api/api_client.py
+++ b/samples/openapi3/client/petstore/python/petstore_api/api_client.py
@@ -122,7 +122,8 @@ class ApiClient(object):
             query_params=None, header_params=None, body=None, post_params=None,
             files=None, response_type=None, auth_settings=None,
             _return_http_data_only=None, collection_formats=None,
-            _preload_content=True, _request_timeout=None, _host=None):
+            _preload_content=True, _request_timeout=None, _host=None,
+            _request_auth=None):
 
         config = self.configuration
 
@@ -163,7 +164,9 @@ class ApiClient(object):
             post_params.extend(self.files_parameters(files))
 
         # auth setting
-        self.update_params_for_auth(header_params, query_params, auth_settings)
+        self.update_params_for_auth(
+            header_params, query_params, auth_settings,
+            request_auth=_request_auth)
 
         # body
         if body:
@@ -323,7 +326,8 @@ class ApiClient(object):
                  body=None, post_params=None, files=None,
                  response_type=None, auth_settings=None, async_req=None,
                  _return_http_data_only=None, collection_formats=None,
-                 _preload_content=True, _request_timeout=None, _host=None):
+                 _preload_content=True, _request_timeout=None, _host=None,
+                 _request_auth=None):
         """Makes the HTTP request (synchronous) and returns deserialized data.
 
         To make an async_req request, set the async_req parameter.
@@ -353,6 +357,10 @@ class ApiClient(object):
                                  number provided, it will be total request
                                  timeout. It can also be a pair (tuple) of
                                  (connection, read) timeouts.
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the authentication
+                              in the spec for a single request.
+        :type _request_token: dict, optional
         :return:
             If async_req parameter is True,
             the request will be called asynchronously.
@@ -366,7 +374,8 @@ class ApiClient(object):
                                    body, post_params, files,
                                    response_type, auth_settings,
                                    _return_http_data_only, collection_formats,
-                                   _preload_content, _request_timeout, _host)
+                                   _preload_content, _request_timeout, _host,
+                                   _request_auth)
 
         return self.pool.apply_async(self.__call_api, (resource_path,
                                                        method, path_params,
@@ -379,7 +388,7 @@ class ApiClient(object):
                                                        collection_formats,
                                                        _preload_content,
                                                        _request_timeout,
-                                                       _host))
+                                                       _host, _request_auth))
 
     def request(self, method, url, query_params=None, headers=None,
                 post_params=None, body=None, _preload_content=True,
@@ -526,29 +535,45 @@ class ApiClient(object):
         else:
             return content_types[0]
 
-    def update_params_for_auth(self, headers, querys, auth_settings):
+    def update_params_for_auth(self, headers, querys, auth_settings,
+                               request_auth=None):
         """Updates header and query params based on authentication setting.
 
         :param headers: Header parameters dict to be updated.
         :param querys: Query parameters tuple list to be updated.
         :param auth_settings: Authentication setting identifiers list.
+        :param request_auth: if set, the provided settings will
+                             override the token in the configuration.
         """
         if not auth_settings:
             return
 
+        if request_auth:
+            self._apply_auth_params(headers, querys, request_auth)
+            return
+
         for auth in auth_settings:
             auth_setting = self.configuration.auth_settings().get(auth)
             if auth_setting:
-                if auth_setting['in'] == 'cookie':
-                    headers['Cookie'] = auth_setting['value']
-                elif auth_setting['in'] == 'header':
-                    headers[auth_setting['key']] = auth_setting['value']
-                elif auth_setting['in'] == 'query':
-                    querys.append((auth_setting['key'], auth_setting['value']))
-                else:
-                    raise ApiValueError(
-                        'Authentication token must be in `query` or `header`'
-                    )
+                self._apply_auth_params(headers, querys, auth_setting)
+
+    def _apply_auth_params(self, headers, querys, auth_setting):
+        """Updates the request parameters based on a single auth_setting
+
+        :param headers: Header parameters dict to be updated.
+        :param querys: Query parameters tuple list to be updated.
+        :param auth_setting: auth settings for the endpoint
+        """
+        if auth_setting['in'] == 'cookie':
+            headers['Cookie'] = auth_setting['value']
+        elif auth_setting['in'] == 'header':
+            headers[auth_setting['key']] = auth_setting['value']
+        elif auth_setting['in'] == 'query':
+            querys.append((auth_setting['key'], auth_setting['value']))
+        else:
+            raise ApiValueError(
+                'Authentication token must be in `query` or `header`'
+            )
 
     def __deserialize_file(self, response):
         """Deserializes body to file