public async Task <IActionResult> SendCode(SendCodeViewModel model)
        {
            if (!ModelState.IsValid)
            {
                return(View());
            }

            var user = await SignInManager.GetTwoFactorAuthenticationUserAsync();

            if (user == null)
            {
                return(ErrorResult());
            }

            // Generate the token and send it
            var code = await UserManager.GenerateTwoFactorTokenAsync(user, model.SelectedProvider);

            if (string.IsNullOrWhiteSpace(code))
            {
                return(ErrorResult());
            }

            if (model.SelectedProvider == "Email")
            {
                await EmailSender.SendEmailCommunicationAsync(
                    SystemCommunicationPurposes.UserTwoFactorLoginCode,
                    CommunicationModelFactory.CreateSimpleCodeModel(code),
                    await UserManager.GetEmailAsync(user));
            }
            else if (model.SelectedProvider == "Phone")
            {
                await SmsSender.SendSmsCommunicationAsync(
                    SystemCommunicationPurposes.UserTwoFactorLoginCode,
                    CommunicationModelFactory.CreateSimpleCodeModel(code),
                    await UserManager.GetPhoneNumberAsync(user));
            }

            return(RedirectToAction(nameof(VerifyCode), new { Provider = model.SelectedProvider, ReturnUrl = model.ReturnUrl, RememberMe = model.RememberMe }));
        }