/**
  * @author LAHAXE Arnaud
  *
  *
  * @return mixed
  */
 public function auth()
 {
     try {
         $key = $this->u2f->doAuthenticate(\Auth::user(), \Session::get('u2f.authenticationData'), json_decode(\Input::get('authentication')));
         \Event::fire('u2f.authentication', ['u2fKey' => $key, 'user' => \Auth::user()]);
         \Session::forget('u2f.authenticationData');
         return $this->redirectAfterSuccessAuth();
     } catch (\Exception $e) {
         \Session::flash('error', $e->getMessage());
         return \Redirect::route('u2f.auth.data');
     }
 }