public IActionResult ConfirmEmail(string userId, string code)
        {
            if (userId == null || code == null)
            {
                return(RedirectToAction(nameof(HomeController.Index), "Home"));
            }

            UserData user = _authentication.GetUserById(userId);

            if (user == null)
            {
                throw new ApplicationException($"Unable to load user with ID '{userId}'.");
            }

            AuthResult result = _authentication.ConfirmEmail(userId, code);

            return(View(result.Succeded ? "ConfirmEmail" : "Error"));
        }