public async Task <IActionResult> SendVerificationSms(IndexViewModel model)
{
if (!ModelState.IsValid)
{
return(RedirectToAction(nameof(Index)));
}
var user = await _userManager.GetUserAsync(User);
if (user == null)
{
throw new ApplicationException($"Unable to load user with ID '{_userManager.GetUserId(User)}'.");
}
string code = await _userManager.GenerateChangePhoneNumberTokenAsync(user, model.PhoneNumber);
await _smsSender.SendVerificationCode(model.PhoneNumber, code);
return(RedirectToAction(nameof(VerifyNumber)));
}