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 AuthorizedUser { 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 AuthorizedUser { 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>");
          SetProfileCache(model.Email);

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

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