[HttpPost]
    [AllowAnonymous]
    public async Task<ActionResult> VerifyCode(string pin)
    {
        string userId = await SignInManager.GetVerifiedUserIdAsync().WithCurrentCulture();

        if (userId == null || String.IsNullOrEmpty(pin))
        {
            return View("Error");
        }

        var user = await UserManager.FindByIdAsync(userId);

        if (await UserManager.VerifyTwoFactorTokenAsync(user.Id, "EmailCode", pin))
        {
            await SignInManager.SignInAsync(user, false, false);
            return RedirectToAction("Index", "Dashboards");
        }
        else
        {
            ModelState.AddModelError("", "Invalid code");
        }

        return View();
    }

// Enables the application to temporarily store user information when they are verifying the second factor in the two-factor authentication process.
        app.UseTwoFactorSignInCookie(DefaultAuthenticationTypes.TwoFactorCookie, TimeSpan.FromMinutes(10));

        // Enables the application to remember the second login verification factor such as phone or email.
        // Once you check this option, your second step of verification during the login process will be remembered on the device where you logged in from.
        // This is similar to the RememberMe option when you log in.
        app.UseTwoFactorRememberBrowserCookie(DefaultAuthenticationTypes.TwoFactorRememberBrowserCookie);

manager.RegisterTwoFactorProvider("EmailCode", new EmailTokenProvider<ApplicationUser>
        {
            Subject = "Security Code",
            BodyFormat = "Your security code is {0}"
        });

        manager.EmailService = new EmailService();
        //manager.SmsService = new SmsService();
        var dataProtectionProvider = options.DataProtectionProvider;
        if (dataProtectionProvider != null)
        {
            manager.UserTokenProvider =
                new DataProtectorTokenProvider<ApplicationUser>(dataProtectionProvider.Create("ASP.NET Identity"));
        }

        return manager;