'{username}', 'apiKey' => '{apiKey}', )); // 2. Obtain a Database service object from the client. $databaseService = $client->databaseService(null, '{region}'); // 3. Retrieve the database configuration. $configuration = $databaseService->configuration('{configId}'); // 4. List instances using this configuration. $instances = $configuration->instanceList(); foreach ($instances as $instance) { /** @var $instance OpenCloud\Database\Resource\Instance **/ }