diff --git a/modules/openapi-generator/src/main/resources/r/api.mustache b/modules/openapi-generator/src/main/resources/r/api.mustache
index e29573f23b2..e3aabd05c19 100644
--- a/modules/openapi-generator/src/main/resources/r/api.mustache
+++ b/modules/openapi-generator/src/main/resources/r/api.mustache
@@ -430,18 +430,9 @@
       {{#isBasic}}
       {{#isBasicBasic}}
       # HTTP basic auth
-      if (is.null(self$api_client$username) || is.null(self$api_client$password)) {
-        {{#useDefaultExceptionHandling}}
-        stop("username, password in `api_client` must be set for authentication in the endpoint `{{{operationId}}}`.")
-        {{/useDefaultExceptionHandling}}
-        {{#useRlangExceptionHandling}}
-        rlang::abort(message = "username, password in `api_client` must be set for authentication in the endpoint `{{{operationId}}}`.",
-                     .subclass = "ApiException",
-                     ApiException = ApiException$new(status = 0,
-                                                     reason = "username, password in `api_client` must be set for authentication in the endpoint `{{{operationId}}}`."))
-        {{/useRlangExceptionHandling}}
+      if (!is.null(self$api_client$username) || !is.null(self$api_client$password)) {
+        header_params["Authorization"] <- paste("Basic", base64enc::base64encode(charToRaw(paste(self$api_client$username, self$api_client$password, sep = ":"))))
       }
-      header_params["Authorization"] <- paste("Basic", base64enc::base64encode(charToRaw(paste(self$api_client$username, self$api_client$password, sep = ":"))))
       {{/isBasicBasic}}
       {{#isBasicBearer}}
       # Bearer token
diff --git a/samples/client/petstore/R-httr2-wrapper/R/pet_api.R b/samples/client/petstore/R-httr2-wrapper/R/pet_api.R
index 9867ba330f9..e2b0e92cccc 100644
--- a/samples/client/petstore/R-httr2-wrapper/R/pet_api.R
+++ b/samples/client/petstore/R-httr2-wrapper/R/pet_api.R
@@ -719,13 +719,9 @@ PetApi <- R6::R6Class(
 
       local_var_url_path <- "/pet"
       # HTTP basic auth
-      if (is.null(self$api_client$username) || is.null(self$api_client$password)) {
-        rlang::abort(message = "username, password in `api_client` must be set for authentication in the endpoint `add_pet`.",
-                     .subclass = "ApiException",
-                     ApiException = ApiException$new(status = 0,
-                                                     reason = "username, password in `api_client` must be set for authentication in the endpoint `add_pet`."))
+      if (!is.null(self$api_client$username) || !is.null(self$api_client$password)) {
+        header_params["Authorization"] <- paste("Basic", base64enc::base64encode(charToRaw(paste(self$api_client$username, self$api_client$password, sep = ":"))))
       }
-      header_params["Authorization"] <- paste("Basic", base64enc::base64encode(charToRaw(paste(self$api_client$username, self$api_client$password, sep = ":"))))
 
       # The Accept request HTTP header
       local_var_accepts <- list("application/xml", "application/json")
diff --git a/samples/client/petstore/R-httr2/R/pet_api.R b/samples/client/petstore/R-httr2/R/pet_api.R
index 8ea511e551d..14319ac68a3 100644
--- a/samples/client/petstore/R-httr2/R/pet_api.R
+++ b/samples/client/petstore/R-httr2/R/pet_api.R
@@ -719,13 +719,9 @@ PetApi <- R6::R6Class(
 
       local_var_url_path <- "/pet"
       # HTTP basic auth
-      if (is.null(self$api_client$username) || is.null(self$api_client$password)) {
-        rlang::abort(message = "username, password in `api_client` must be set for authentication in the endpoint `add_pet`.",
-                     .subclass = "ApiException",
-                     ApiException = ApiException$new(status = 0,
-                                                     reason = "username, password in `api_client` must be set for authentication in the endpoint `add_pet`."))
+      if (!is.null(self$api_client$username) || !is.null(self$api_client$password)) {
+        header_params["Authorization"] <- paste("Basic", base64enc::base64encode(charToRaw(paste(self$api_client$username, self$api_client$password, sep = ":"))))
       }
-      header_params["Authorization"] <- paste("Basic", base64enc::base64encode(charToRaw(paste(self$api_client$username, self$api_client$password, sep = ":"))))
 
       # The Accept request HTTP header
       local_var_accepts <- list("application/xml", "application/json")
diff --git a/samples/client/petstore/R/R/pet_api.R b/samples/client/petstore/R/R/pet_api.R
index bb02aec7ee3..c107111865d 100644
--- a/samples/client/petstore/R/R/pet_api.R
+++ b/samples/client/petstore/R/R/pet_api.R
@@ -719,13 +719,9 @@ PetApi <- R6::R6Class(
 
       local_var_url_path <- "/pet"
       # HTTP basic auth
-      if (is.null(self$api_client$username) || is.null(self$api_client$password)) {
-        rlang::abort(message = "username, password in `api_client` must be set for authentication in the endpoint `AddPet`.",
-                     .subclass = "ApiException",
-                     ApiException = ApiException$new(status = 0,
-                                                     reason = "username, password in `api_client` must be set for authentication in the endpoint `AddPet`."))
+      if (!is.null(self$api_client$username) || !is.null(self$api_client$password)) {
+        header_params["Authorization"] <- paste("Basic", base64enc::base64encode(charToRaw(paste(self$api_client$username, self$api_client$password, sep = ":"))))
       }
-      header_params["Authorization"] <- paste("Basic", base64enc::base64encode(charToRaw(paste(self$api_client$username, self$api_client$password, sep = ":"))))
 
       # The Accept request HTTP header
       local_var_accepts <- list("application/xml", "application/json")
diff --git a/samples/client/petstore/R/tests/testthat/test_petstore.R b/samples/client/petstore/R/tests/testthat/test_petstore.R
index da38644bad3..43a642d3f0a 100644
--- a/samples/client/petstore/R/tests/testthat/test_petstore.R
+++ b/samples/client/petstore/R/tests/testthat/test_petstore.R
@@ -12,8 +12,10 @@ pet <- Pet$new("name_test",
   status = "available"
 )
 
-pet_api$api_client$username <- ""
-pet_api$api_client$password <- ""
+# no need to set uasername, password and there should be no error
+# since the endpoint can support multi auth schema
+#pet_api$api_client$username <- ""
+#pet_api$api_client$password <- ""
 result <- pet_api$AddPet(pet)
 
 test_that("Test toJSONString", {