public ActionResult Login(LoginViewModel model)
        {
            //_usersProvider.LoginUser(model.Login, model.Password);

            var user = _usersProvider.LoginUser(model.Login, model.Password);

            if (user == null)
            {
                model.UserNotExist = true;
            }
            else
            {
                UserContext.SetUser(user);
                return(RedirectToAction("Profile"));
            }
            return(View(model));
        }