public ActionResult DeleteUser()
        {
            string license = Payload["license"];

            string result = authenticate.DeleteUser(license);

            if (result == "不存在此用户")
            {
                return(Ok(new
                {
                    success = false,
                    msg = result
                }));
            }
            else
            {
                return(Ok(new
                {
                    success = true,
                    msg = result
                }));
            }
        }