'default', 'version' => '2018-10-26', 'region' => 'us-east-2' ]); $awsAccounts = ['0123456789']; try { $result = $client->inviteMembers([ 'AccountIds' => $awsAccounts, ]); var_dump($result); } catch (AwsException $e) { // output error message if fails echo $e->getMessage() . "\n"; } // snippet-end:[securityhub.php.list_members.main] // snippet-end:[securityhub.php.list_members.complete]