public async Task <ActionResult> Login(LoginModel model)
        {
            //  await SetInitialDataAsync();

            if (ModelState.IsValid)
            {
                UserDTO userDto = new UserDTO {
                    Email = model.Email, Password = model.Password
                };
                ClaimsIdentity claim = await VideoService.Authenticate(userDto);

                if (claim == null)
                {
                    ModelState.AddModelError("", "Неверный логин или пароль.");
                }
                else
                {
                    AuthenticationManager.SignOut();
                    AuthenticationManager.SignIn(new AuthenticationProperties
                    {
                        IsPersistent = true
                    }, claim);
                    int?par = 1;
                    return(RedirectToAction("Index", "Video", par));
                }
            }
            return(View(model));
        }