chore: some refactors

Proto/user.proto

@@ -3,6 +3,7 @@ option csharp_namespace = "JOBot.Proto";
 
 service User {
 	rpc Register (RegisterRequest) returns (RegisterResponse);
+	rpc GetUser (GetUserRequest) returns (GetUserResponse);
 }
 
 import "google/protobuf/wrappers.proto";
@@ -14,4 +15,12 @@ message RegisterRequest{
 
 message RegisterResponse{
 	bool success = 1;
+}
+
+message GetUserRequest {
+	int64 user_id = 1;
+}
+
+message GetUserResponse {
+	bool logged_to_hh = 1;
 }