'{username}', 'apiKey' => '{apiKey}', )); // 2. Obtain a Networking service object from the client. $networkingService = $client->networkingService(null, '{region}'); // 3. List security groups $securityGroups = $networkingService->listSecurityGroups(); foreach ($securityGroups as $securityGroup) { /** @var $securityGroup OpenCloud\Networking\Resource\SecurityGroup **/ }