code: def create_action_token(self, action, expires_in):
          
          return utils.sign_url_safe(self.user.id,
                                     secret_key=get_jwt_secret(),
                                     salt=action,
                                     expires_in=expires_in)
docs: Create a url safe action token attached to the user
          :param action:
          :param expires_in:
          :return: