diff --git a/src/c2se/backend/identity.rs b/src/c2se/backend/identity.rs
index c8b3a15..270b4f3 100644
--- a/src/c2se/backend/identity.rs
+++ b/src/c2se/backend/identity.rs
@@ -28,6 +28,16 @@ pub struct SigninRequest {
 }
 #[derive(Clone, PartialEq, ::prost::Message)]
 pub struct SigninResponse {
-  #[prost(string, tag = "1")]
-  pub session_id: ::prost::alloc::string::String,
+  #[prost(message, optional, tag = "1")]
+  pub error: ::core::option::Option<rpc::Error>,
+  #[prost(message, optional, tag = "2")]
+  pub result: ::core::option::Option<signin_response::Result>,
+}
+/// Nested message and enum types in `SigninResponse`.
+pub mod signin_response {
+  #[derive(Clone, PartialEq, ::prost::Message)]
+  pub struct Result {
+    #[prost(string, tag = "1")]
+    pub session_id: ::prost::alloc::string::String,
+  }
 }
diff --git a/src/c2se/backend/member.rs b/src/c2se/backend/member.rs
index 466bf76..45f78d4 100644
--- a/src/c2se/backend/member.rs
+++ b/src/c2se/backend/member.rs
@@ -1,5 +1,5 @@
-use crate::models::member;
 use crate::protobuf::pagination;
+use crate::protobuf::rpc;
 
 const SUBJECT: &str = "bet.beteran.c2se.backend.member";
 
@@ -16,10 +16,21 @@ pub struct ListMembersRequest {
 }
 #[derive(Clone, PartialEq, ::prost::Message)]
 pub struct ListMembersResponse {
-  #[prost(message, repeated, tag = "1")]
-  pub members: ::prost::alloc::vec::Vec<member::Member>,
+  #[prost(message, optional, tag = "1")]
+  pub error: ::core::option::Option<rpc::Error>,
+  #[prost(message, optional, tag = "2")]
+  pub result: ::core::option::Option<list_members_response::Result>,
 }
+/// Nested message and enum types in `ListMembersResponse`.
+pub mod list_members_response {
+  use crate::models::member;
 
+  #[derive(Clone, PartialEq, ::prost::Message)]
+  pub struct Result {
+    #[prost(message, repeated, tag = "1")]
+    pub members: ::prost::alloc::vec::Vec<member::Member>,
+  }
+}
 pub const SUBJECT_GET_MEMBER: &str = const_format::concatcp!(SUBJECT, ".GetMember");
 /// subject = bet.beteran.c2se.backend.member.GetMember
 #[derive(Clone, PartialEq, ::prost::Message)]
@@ -30,9 +41,19 @@ pub struct GetMemberRequest {
 #[derive(Clone, PartialEq, ::prost::Message)]
 pub struct GetMemberResponse {
   #[prost(message, optional, tag = "1")]
-  pub member: ::core::option::Option<member::Member>,
+  pub error: ::core::option::Option<rpc::Error>,
+  #[prost(message, optional, tag = "2")]
+  pub result: ::core::option::Option<get_member_response::Result>,
+}
+/// Nested message and enum types in `GetMemberResponse`.
+pub mod get_member_response {
+  use crate::models::member;
+  #[derive(Clone, PartialEq, ::prost::Message)]
+  pub struct Result {
+    #[prost(message, optional, tag = "1")]
+    pub member: ::core::option::Option<member::Member>,
+  }
 }
-
 pub const SUBJECT_GET_MEMBER_BY_USERNAME: &str =
   const_format::concatcp!(SUBJECT, ".GetMemberByUsername");
 /// subject = bet.beteran.c2se.backend.member.GetMemberByUsername
@@ -44,5 +65,16 @@ pub struct GetMemberByUsernameRequest {
 #[derive(Clone, PartialEq, ::prost::Message)]
 pub struct GetMemberByUsernameResponse {
   #[prost(message, optional, tag = "1")]
-  pub member: ::core::option::Option<member::Member>,
+  pub error: ::core::option::Option<rpc::Error>,
+  #[prost(message, optional, tag = "2")]
+  pub result: ::core::option::Option<get_member_by_username_response::Result>,
+}
+/// Nested message and enum types in `GetMemberByUsernameResponse`.
+pub mod get_member_by_username_response {
+  use crate::models::member;
+  #[derive(Clone, PartialEq, ::prost::Message)]
+  pub struct Result {
+    #[prost(message, optional, tag = "1")]
+    pub member: ::core::option::Option<member::Member>,
+  }
 }
diff --git a/src/c2se/common/identity.rs b/src/c2se/common/identity.rs
index 0b74cfe..02f776b 100644
--- a/src/c2se/common/identity.rs
+++ b/src/c2se/common/identity.rs
@@ -2,37 +2,70 @@ use crate::protobuf::rpc;
 
 const SUBJECT: &str = "bet.beteran.c2se.common.identity";
 
+pub const SUBJECT_CHECK_USERNAME_FOR_DUPLICATION: &str =
+  const_format::concatcp!(SUBJECT, ".CheckUsernameForDuplication");
+/// subject = bet.beteran.c2se.common.identity.CheckUsernameForDuplication;
 #[derive(Clone, PartialEq, ::prost::Message)]
 pub struct CheckUsernameForDuplicationRequest {
   #[prost(string, tag = "1")]
   pub username: ::prost::alloc::string::String,
 }
-
 #[derive(Clone, PartialEq, ::prost::Message)]
 pub struct CheckUsernameForDuplicationResponse {
-  #[prost(bool, tag = "1")]
-  pub duplicated: bool,
+  #[prost(message, optional, tag = "1")]
+  pub error: ::core::option::Option<rpc::Error>,
+  #[prost(message, optional, tag = "2")]
+  pub result: ::core::option::Option<check_username_for_duplication_response::Result>,
 }
-
+/// Nested message and enum types in `CheckUsernameForDuplicationResponse`.
+pub mod check_username_for_duplication_response {
+  #[derive(Clone, PartialEq, ::prost::Message)]
+  pub struct Result {
+    #[prost(bool, tag = "1")]
+    pub duplicated: bool,
+  }
+}
+pub const SUBJECT_CHECK_NICKNAME_FOR_DUPLICATION: &str =
+  const_format::concatcp!(SUBJECT, ".CheckNicknameForDuplication");
+/// subject = bet.beteran.c2se.common.identity.CheckNicknameForDuplication;
 #[derive(Clone, PartialEq, ::prost::Message)]
 pub struct CheckNicknameForDuplicationRequest {
   #[prost(string, tag = "1")]
   pub nickname: ::prost::alloc::string::String,
 }
-
 #[derive(Clone, PartialEq, ::prost::Message)]
 pub struct CheckNicknameForDuplicationResponse {
-  #[prost(bool, tag = "1")]
-  pub duplicated: bool,
+  #[prost(message, optional, tag = "1")]
+  pub error: ::core::option::Option<rpc::Error>,
+  #[prost(message, optional, tag = "2")]
+  pub result: ::core::option::Option<check_nickname_for_duplication_response::Result>,
 }
-
+/// Nested message and enum types in `CheckNicknameForDuplicationResponse`.
+pub mod check_nickname_for_duplication_response {
+  #[derive(Clone, PartialEq, ::prost::Message)]
+  pub struct Result {
+    #[prost(bool, tag = "1")]
+    pub duplicated: bool,
+  }
+}
+pub const SUBJECT_CAPTCHA: &str = const_format::concatcp!(SUBJECT, ".Captcha");
+/// subject = bet.beteran.c2se.common.identity.Captcha
 #[derive(Clone, PartialEq, ::prost::Message)]
 pub struct CaptchaRequest {}
-
 #[derive(Clone, PartialEq, ::prost::Message)]
 pub struct CaptchaResponse {
-  #[prost(string, tag = "1")]
-  pub token: ::prost::alloc::string::String,
-  #[prost(string, tag = "2")]
-  pub image: ::prost::alloc::string::String,
+  #[prost(message, optional, tag = "1")]
+  pub error: ::core::option::Option<rpc::Error>,
+  #[prost(message, optional, tag = "2")]
+  pub result: ::core::option::Option<captcha_response::Result>,
+}
+/// Nested message and enum types in `CaptchaResponse`.
+pub mod captcha_response {
+  #[derive(Clone, PartialEq, ::prost::Message)]
+  pub struct Result {
+    #[prost(string, tag = "1")]
+    pub token: ::prost::alloc::string::String,
+    #[prost(string, tag = "2")]
+    pub image: ::prost::alloc::string::String,
+  }
 }
diff --git a/src/c2se/frontend/identity.rs b/src/c2se/frontend/identity.rs
index 9a8e2fd..1698f4e 100644
--- a/src/c2se/frontend/identity.rs
+++ b/src/c2se/frontend/identity.rs
@@ -26,9 +26,18 @@ pub struct SigninRequest {
   #[prost(string, tag = "4")]
   pub password: ::prost::alloc::string::String,
 }
-
 #[derive(Clone, PartialEq, ::prost::Message)]
 pub struct SigninResponse {
-  #[prost(string, tag = "1")]
-  pub session_id: ::prost::alloc::string::String,
+  #[prost(message, optional, tag = "1")]
+  pub error: ::core::option::Option<rpc::Error>,
+  #[prost(message, optional, tag = "2")]
+  pub result: ::core::option::Option<signin_response::Result>,
+}
+/// Nested message and enum types in `SigninResponse`.
+pub mod signin_response {
+  #[derive(Clone, PartialEq, ::prost::Message)]
+  pub struct Result {
+    #[prost(string, tag = "1")]
+    pub session_id: ::prost::alloc::string::String,
+  }
 }
diff --git a/src/ss/member/identity.rs b/src/ss/member/identity.rs
index 1dfb9b2..af80c35 100644
--- a/src/ss/member/identity.rs
+++ b/src/ss/member/identity.rs
@@ -15,10 +15,19 @@ pub struct CheckUsernameForDuplicationRequest {
 }
 #[derive(Clone, PartialEq, ::prost::Message)]
 pub struct CheckUsernameForDuplicationResponse {
-  #[prost(bool, tag = "1")]
-  pub duplicated: bool,
+  #[prost(message, optional, tag = "1")]
+  pub error: ::core::option::Option<rpc::Error>,
+  #[prost(message, optional, tag = "2")]
+  pub result: ::core::option::Option<check_username_for_duplication_response::Result>,
+}
+/// Nested message and enum types in `CheckUsernameForDuplicationResponse`.
+pub mod check_username_for_duplication_response {
+  #[derive(Clone, PartialEq, ::prost::Message)]
+  pub struct Result {
+    #[prost(bool, tag = "1")]
+    pub duplicated: bool,
+  }
 }
-
 pub const SUBJECT_CHECK_NICKNAME_FOR_DUPLICATION: &str =
   const_format::concatcp!(SUBJECT, ".CheckNicknameForDuplication");
 /// subject = bet.beteran.ss.member.identity.CheckNicknameForDuplication;
@@ -31,10 +40,19 @@ pub struct CheckNicknameForDuplicationRequest {
 }
 #[derive(Clone, PartialEq, ::prost::Message)]
 pub struct CheckNicknameForDuplicationResponse {
-  #[prost(bool, tag = "1")]
-  pub duplicated: bool,
+  #[prost(message, optional, tag = "1")]
+  pub error: ::core::option::Option<rpc::Error>,
+  #[prost(message, optional, tag = "2")]
+  pub result: ::core::option::Option<check_nickname_for_duplication_response::Result>,
+}
+/// Nested message and enum types in `CheckNicknameForDuplicationResponse`.
+pub mod check_nickname_for_duplication_response {
+  #[derive(Clone, PartialEq, ::prost::Message)]
+  pub struct Result {
+    #[prost(bool, tag = "1")]
+    pub duplicated: bool,
+  }
 }
-
 pub const SUBJECT_CAPTCHA: &str = const_format::concatcp!(SUBJECT, ".Captcha");
 /// subject = bet.beteran.ss.member.identity.Captcha
 #[derive(Clone, PartialEq, ::prost::Message)]
@@ -44,12 +62,21 @@ pub struct CaptchaRequest {
 }
 #[derive(Clone, PartialEq, ::prost::Message)]
 pub struct CaptchaResponse {
-  #[prost(string, tag = "1")]
-  pub token: ::prost::alloc::string::String,
-  #[prost(string, tag = "2")]
-  pub image: ::prost::alloc::string::String,
+  #[prost(message, optional, tag = "1")]
+  pub error: ::core::option::Option<rpc::Error>,
+  #[prost(message, optional, tag = "2")]
+  pub result: ::core::option::Option<captcha_response::Result>,
+}
+/// Nested message and enum types in `CaptchaResponse`.
+pub mod captcha_response {
+  #[derive(Clone, PartialEq, ::prost::Message)]
+  pub struct Result {
+    #[prost(string, tag = "1")]
+    pub token: ::prost::alloc::string::String,
+    #[prost(string, tag = "2")]
+    pub image: ::prost::alloc::string::String,
+  }
 }
-
 pub const SUBJECT_SIGNIN: &str = const_format::concatcp!(SUBJECT, ".Signin");
 /// subject = bet.beteran.ss.member.identity.Signin
 #[derive(Clone, PartialEq, ::prost::Message)]
@@ -67,6 +94,16 @@ pub struct SigninRequest {
 }
 #[derive(Clone, PartialEq, ::prost::Message)]
 pub struct SigninResponse {
-  #[prost(string, tag = "1")]
-  pub session_id: ::prost::alloc::string::String,
+  #[prost(message, optional, tag = "1")]
+  pub error: ::core::option::Option<rpc::Error>,
+  #[prost(message, optional, tag = "2")]
+  pub result: ::core::option::Option<signin_response::Result>,
+}
+/// Nested message and enum types in `SigninResponse`.
+pub mod signin_response {
+  #[derive(Clone, PartialEq, ::prost::Message)]
+  pub struct Result {
+    #[prost(string, tag = "1")]
+    pub session_id: ::prost::alloc::string::String,
+  }
 }