public async Task <IActionResult> DisableFido2()
        {
            var user = await _userManager.GetUserAsync(User);

            if (user.PasswordHash == null)
            {
                return(RedirectToAction("Index", "AccountManage"));
            }
            var disableFido2ViewModel = new DisableFido2ViewModel {
            };

            return(View(disableFido2ViewModel));
        }
        public async Task <IActionResult> DisableFido2(DisableFido2ViewModel disableFido2ViewModel)
        {
            if (ModelState.IsValid)
            {
                var user = await _userManager.GetUserAsync(User);

                if (user == null)
                {
                    return(new NotFoundResult());
                }
                if (disableFido2ViewModel.Confirmation)
                {
                    _fido2Service.RemoveFido2StoredCredentialsByUserNameAsync(user.UserName);
                }
                return(RedirectToAction("Index", "AccountManage"));
            }
            ModelState.AddModelError(string.Empty, "invalid operation.");
            return(View(disableFido2ViewModel));
        }