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 ) { // Insert a new user into the database using( UsersContext db = new UsersContext() ) { UserProfile user = db.UserProfiles.FirstOrDefault(u => u.UserName.ToLower() == model.UserName.ToLower()); // Check if user already exists if( user == null ) { // Insert name into the profile table db.UserProfiles.Add(new UserProfile { UserName = model.UserName }); db.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); }