protected function registerManager()
    {
        $this->app->singleton('notifyme', function ($app) {
            $config = $app['config'];
            $factory = $app['notifyme.factory'];

            return new NotifyMeManager($config, $factory);
        });

        $this->app->alias('notifyme', NotifyMeManager::class);
        $this->app->alias('notifyme', ManagerInterface::class);
    }