public async Task<ActionResult> ExternalLoginConfirmation(ExternalLoginConfirmationViewModel model, string returnUrl) {
         if (User.Identity.IsAuthenticated) {
            return RedirectToAction("Index", "Manage");
         }

         if (ModelState.IsValid) {
            // Get the information about the user from the external login provider
            var info = await AuthenticationManager.GetExternalLoginInfoAsync();
            if (info == null) {
               return View("ExternalLoginFailure");
            }
            var user = new TcrUser { UserName = model.Email, Email = model.Email };
            var result = await UserManager.CreateAsync(user);
            if (result.Succeeded) {
               result = await UserManager.AddLoginAsync(user.Id, info.Login);
               if (result.Succeeded) {
                  await SignInManager.SignInAsync(user, isPersistent: false, rememberBrowser: false);
                  return RedirectToLocal(returnUrl);
               }
            }
            AddErrors(result);
         }

         ViewBag.ReturnUrl = returnUrl;
         return View(model);
      }
      public async Task<ActionResult> Register(RegisterViewModel model) {
         if (ModelState.IsValid) {
            var user = new TcrUser { UserName = model.Email, Email = model.Email };
            var result = await UserManager.CreateAsync(user, model.Password);
            if (result.Succeeded) {
               await SignInManager.SignInAsync(user, isPersistent: false, rememberBrowser: false);

               // For more information on how to enable account confirmation and password reset please visit http://go.microsoft.com/fwlink/?LinkID=320771
               // Send an email with this link
               // string code = await UserManager.GenerateEmailConfirmationTokenAsync(user.Id);
               // var callbackUrl = Url.Action("ConfirmEmail", "Account", new { userId = user.Id, code = code }, protocol: Request.Url.Scheme);
               // await UserManager.SendEmailAsync(user.Id, "Confirm your account", "Please confirm your account by clicking <a href=\"" + callbackUrl + "\">here</a>");

               return RedirectToAction("Index", "Home");
            }
            AddErrors(result);
         }

         // If we got this far, something failed, redisplay form
         return View(model);
      }