Hi @rp_st The SignUp or SignIn handler makes a call to the core that returns status: FIELD_ERROR in case of error, with a message in english. I want to customize it in the frontend, and not use the message coming from the API but regardless of the error, it's the same FIELD_ERROR status. For example I can't diferentiate the password format error and the email already exist error on the frontend. Is there a way to do that ?