public async Task<ActionResult> ResetPassword(ResetPasswordViewModel model)
        {
            if (!ModelState.IsValid)
            {
                return View(model);
            }
            var user = await UserManager.FindByNameAsync(model.UserName);
            if (user == null)
            {
                // 不顯示使用者不存在
                return RedirectToAction("ResetPasswordConfirmation", "Account");
            }

            // 原本的
            //var result = await UserManager.ResetPasswordAsync(user.Id, model.Code, model.Password);

            // 刪除原本的密碼後再重新設定
            UserManager.RemovePassword(user.Id);
            var result = UserManager.AddPassword(user.Id, model.Password);

            if (result.Succeeded)
            {
                return RedirectToAction("ResetPasswordConfirmation", "Account");
            }
            AddErrors(result);
            return View();
        }
        public ActionResult ResetPassword()
        {
            ResetPasswordViewModel resetPasswordViewModel = new ResetPasswordViewModel()
            {
                UserName = loginUser.UserName,
                Password = null,
                ConfirmPassword = null
            };

            return View(resetPasswordViewModel);
        }