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 ); }