code: def get_user_and_user_email_by_id(self, user_or_user_email_id):
          
          if self.UserEmailClass:
              user_email = self.db_adapter.get_object(self.UserEmailClass, user_or_user_email_id)
              user = user_email.user if user_email else None
          else:
              user = self.db_adapter.get_object(self.UserClass, user_or_user_email_id)
              user_email = user
          return (user, user_email)
docs: Retrieve the User and UserEmail object by ID.