public ActionResult Register(RegisterModel user)
        {
            UserManage userM = new UserManage();
            Model1     db    = new Model1();

            if (ModelState.IsValid)
            {
                if (userM.CheckEmail(user.email) == false && userM.CheckAccount(user.username) == false)
                {
                    User userDB = new User
                    {
                        Name        = user.name,
                        Address     = user.address,
                        PhoneNumber = user.phone,
                        Account     = user.username,
                        Email       = user.email,
                        Password    = Encrypt.Encrypts(user.Password)
                    };
                    db.Users.Add(userDB);
                    db.SaveChanges();
                    return(RedirectToAction("Login", "User"));
                }
                else
                {
                    ModelState.AddModelError("RegisterFail", "Đăng ký không thành công");
                    ViewBag.notification = "Username or Email already exist";
                }
            }
            return(View());
        }