Return tokens in the message body

Signed-off-by: Nikolai Rodionov <iam@allanger.xyz>

proto/accounts/v1/accounts_v1.proto

@@ -9,9 +9,9 @@ option go_package = "gitea.badhouseplants.net/softplayer/softplayer-go-proto/pkg
  */
 service PublicAccountsService {
   // Sing in into an existing account
-  rpc SignIn (SignInRequest) returns (google.protobuf.Empty) {}
+  rpc SignIn (SignInRequest) returns (SignInResponse) {}
   // Create a new account
-  rpc SignUp (SignUpRequest) returns (google.protobuf.Empty) {}
+  rpc SignUp (SignUpRequest) returns (SignUpResponse) {}
 }
 
 service AccountsService {
@@ -26,6 +26,12 @@ service RefreshSessionService {
   rpc RefreshSession(RefreshSessionRequest) returns (RefreshSessionResponse) {}
 }
 
+message TokenPair {
+  string access_token = 1;
+  string refresh_token = 2;
+}
+
+
 message AccountPassword {
   string password = 1;
 }
@@ -46,11 +52,19 @@ message SignUpRequest {
   PersonalData personal_data = 3;
 }
 
+message SignUpResponse {
+  TokenPair token_pair = 1;
+}
+
 message SignInRequest {
   string email = 1;
   string password = 2;
 };
 
+message SignInResponse {
+  TokenPair token_pair = 1;
+}
+
 message ResetPasswordRequest {
   AccountData data = 1;
 }
@@ -73,11 +87,6 @@ message RefreshTokenRequest {
   string session_id = 1;
 }
 
-message TokenPair {
-  string access_token = 1;
-  string refresh_token = 2;
-}
-
 message RefreshSessionRequest {
   string refresh_token = 1;
 }