/**
  * Obtain the user information from a provider.
  *
  * @param $provider
  *
  * @return \Illuminate\Http\RedirectResponse|\Illuminate\Routing\Redirector
  */
 public function handleProviderCallback($provider)
 {
     return $this->r_users->handleProviderCallbackForAuthentificationWithRedirect($provider, $this->redirectPath());
 }