ASP.NET Identity 2 Invalid no Two factor Provider Exists

Question

For some reason EmailCode is not showing up in the valid two factor authentication providers. PhoneCode however did up until I removed it, now nothing shows up at all. I have debugged and it shows up under the UserManager, but for some odd reason GetValidTwoFactorProvidersAsync doesn't retrieve it. I've already attempted to manually add it by bypassing the method and retrieving the value manually, but then it throws the error message that the Microsoft.AspNet.Identity.EmailTokenProvider does not exist. I am at a loss to explain why this isn't working.

        public async Task<ActionResult> SendCode(string returnUrl)
        {
            var userId = await SignInManager.GetVerifiedUserIdAsync();
            if (userId == null)
            {
                return View("Error");
            }
            var userFactors = await UserManager.GetValidTwoFactorProvidersAsync(userId);
            var factorOptions = userFactors.Select(purpose => new SelectListItem { Text = purpose, Value = purpose }).ToList();
            return View(new SendCodeViewModel { Providers = factorOptions, ReturnUrl = returnUrl });
        }

Identityconfig

            manager.RegisterTwoFactorProvider("EmailCode", new Microsoft.AspNet.Identity.EmailTokenProvider<SystemUser>
                {
                    Subject = "SecurityCode",
                    BodyFormat = "Your security code is {0}"
                });

            manager.EmailService = new EmailService();
            var dataProtectionProvider = options.DataProtectionProvider;

            if (dataProtectionProvider != null)
            {
                manager.UserTokenProvider =
                    new DataProtectorTokenProvider<SystemUser>(
                        dataProtectionProvider.Create("ASP.NET Identity"));
            }
            return manager;
        }

Answer 1

Make sure you have a ConfirmedEmail for the User. You can look up the user in the database and look at the EmailConfirmed flag to see if it is set or not.

Answer 2

Since I can't see your codes and hence can't suggest a proper fix but I can tell you how I did it and all went okay. It came very handy and easy for me when I tried configuring the application for 2 way authentication using these links:

http://www.asp.net/identity/overview/features-api/two-factor-authentication-using-sms-and-email-with-aspnet-identity

http://typecastexception.com/post/2014/04/20/ASPNET-MVC-and-Identity-20-Understanding-the-Basics.aspx

Suggest you to try them if you haven't yet. Hope it helps!