Move refresh logic to a separate service

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

proto/accounts/v1/accounts_v1.proto

@@ -17,11 +17,15 @@ service PublicAccountsService {
 service AccountsService {
   // Is email for the current account verified
   rpc IsEmailVerified (IsEmailVerifiedRequest) returns (IsEmailVerifiedResponse) {}
-  rpc RefreshSession (google.protobuf.Empty) returns (google.protobuf.Empty) {}
   // Authorize using long living tokens
   rpc TokenAuthorization (google.protobuf.Empty) returns (google.protobuf.Empty) {}
 }
 
+// Use as a separate service to make it easier to avoid interceptors on the client
+service RefreshSessionService {
+  rpc RefreshSession(RefreshSessionRequest) returns (RefreshSessionResponse) {}
+}
+
 message AccountPassword {
   string password = 1;
 }
@@ -68,3 +72,16 @@ message IsEmailVerifiedResponse {
 message RefreshTokenRequest {
   string session_id = 1;
 }
+
+message TokenPair {
+  string access_token = 1;
+  string refresh_token = 2;
+}
+
+message RefreshSessionRequest {
+  string refresh_token = 1;
+}
+
+message RefreshSessionResponse {
+  TokenPair token_pair = 1;
+}