public function setUp()
 {
     parent::setUp();
     // we need to mock the clientRepository for authentication
     $this->clientRepository = Mockery::mock('App\\AmbitiousMailSender\\Clients\\ClientRepository', 'ClientRepository');
     $this->app->instance('App\\AmbitiousMailSender\\Clients\\ClientRepository', $this->clientRepository);
     $this->clientRepository->shouldReceive('findByName')->with('user')->andReturn(new Client(['id' => 1, 'apiKey' => 'secret']));
 }