KnpU\OAuth2ClientBundle\Security\Exception\FinishRegistrationException::getUserInformation PHP Method

    public function getUserInformation()
    {
        return $this->userInformation;
    }

 /**
  * Call this from within your onAuthenticationFailure() method.
  *
  * @param Request $request
  * @param FinishRegistrationException $e
  * @return RedirectResponse
  */
 protected function saveUserInfoToSession(Request $request, FinishRegistrationException $e)
 {
     // save the user information!
     $request->getSession()->set('guard.finish_registration.user_information', $e->getUserInformation());
 }