src/LaravelPushbulletServiceProvider.php
public function register()
    {
        $this->app->bind('pushbullet', function () {
            $apiKey = $this->app['config']->get('services.pushbullet.apiKey', null);

            if (!$apiKey) {
                $apiKey = $this->app['config']->get('pushbullet.apiKey', null);
            }

            return new LaravelPushbullet($apiKey);
        });
    }
public function register()
    {
        $this->app->bind('pushbullet', function () {
            $apiKey = $this->app['config']->get('services.pushbullet.apiKey', null);

            if (!$apiKey) {
                $apiKey = $this->app['config']->get('pushbullet.apiKey', null);
            }

            return new LaravelPushbullet($apiKey);
        });
    }
Register the service provider.

@return void