private function getClientForm($client = null)
{
if ($client == null) {
$clientManager = $this->container->get('fos_oauth_server.client_manager.default');
$client = $clientManager->createClient();
}
$form = $this->createForm(new ClientType(), $client, array('action' => $this->generateUrl('configure_api'), 'method' => 'POST'));
return $form;
}