public ActionResult ExternalLoginConfirmation(RegisterExternalLoginModel model, string returnUrl) { string provider = null; string providerUserId = null; if (User.Identity.IsAuthenticated || !OAuthWebSecurity.TryDeserializeProviderUserId(model.ExternalLoginData, out provider, out providerUserId)) { return(RedirectToAction("Manage")); } if (ModelState.IsValid) { UserProfile user = _userProfiles.FirstOrDefault(EntityFilter <UserProfile> .Where(u => u.UserName.ToLower() == model.UserName.ToLower())); // Check if user already exists if (user == null) { // Insert name into the profile table _userProfiles.AddOrUpdate(new UserProfile { UserName = model.UserName }); _userProfiles.SaveChanges(); OAuthWebSecurity.CreateOrUpdateAccount(provider, providerUserId, model.UserName); OAuthWebSecurity.Login(provider, providerUserId, createPersistentCookie: false); return(RedirectToLocal(returnUrl)); } else { ModelState.AddModelError("UserName", "User name already exists. Please enter a different user name."); } } ViewBag.ProviderDisplayName = OAuthWebSecurity.GetOAuthClientData(provider).DisplayName; ViewBag.ReturnUrl = returnUrl; return(View(model)); }