1. Go to this page and download the library: Download thecrazybob/laravel-whmcs library. Choose the download type require.
2. Extract the ZIP file and open the index.php.
3. Add this code to the index.php.
<?php
require_once('vendor/autoload.php');
/* Start to develop here. Best regards https://php-download.com/ */
return [
// API URL
'url' => 'http://url.com/whmcs/PI PASSWORD
'password' => 'password123',
// API RESPONSE TYPE
'response_type' => 'json', // json or xml
];