public function register(Container $app)
 {
     $app['bugsnag'] = function ($app) {
         $client = Client::make($app['bugsnag.options']['apiKey']);
         $client->setNotifier(['name' => 'Silex Bugsnag', 'version' => static::VERSION, 'url' => 'https://github.com/fortis/silex-bugsnag']);
         Handler::register($client);
         return $client;
     };
     $app->error(function (\Exception $error, Request $request) use($app) {
         $params['request'] = ['params' => $request->query->all(), 'requestFormat' => $request->getRequestFormat()];
         $app['bugsnag']->notifyException($error);
     });
 }