whmcs-vpsmanager/config.example.php

<?php
return [
    'vpsmanager_api_url' => '',
    'graphite_url' => '',
    'graphite_auth' => 'none', // Set to basic when the Graphite HTTPS proxy requires it.
    'graphite_username' => '',
    'graphite_password' => '',
    'graphs_authorization_confirmed' => false,
    'graphs_url' => '', // Optional existing full graphs UI base URL; review its authorization.
];