public function testCheckClientCredentials()
 {
     $client_bean = $this->redbean->dispense($this->tables['client']);
     $client = new \ebussola\oauth\client\Client($client_bean);
     $client->redirect_uris = array('localhost');
     $client->client_secret = 'shhhh_this_is_secret';
     $this->assertFalse($this->redbean_storage->checkClientCredentials($client, 'something'));
     $this->assertTrue($this->redbean_storage->checkClientCredentials($client, 'shhhh_this_is_secret'));
 }