public bool Login(LoginDto dto )
 {
     var user = _uWork.UserRepository.FindByUsernameAndPass(dto.Username, dto.Password);
     if (user == null)
         return false;
     else
         return true;
 }
        public ActionResult Login(LoginDto dto)
        {
            ViewBag.ErrorMessage = null;
            if (_accService.Login(dto))
            {
                Session["User"] = dto;
                return RedirectToAction("Index", "Home");
            }

            ViewBag.ErrorMessage = "Username or password are not valid";
            return View(dto);
        }