<?php
//make sure to include this file
require_once 'modules/Configurator/Configurator.php';

//================= To Save =======================

//create Configurator Object
$configuratorObj = new Configurator();
//retrieve config array
$configuratorObj->loadConfig();
//set configuration variables
$configuratorObj->config['custom_api_config']['username'] = "micheal";
$configuratorObj->config['custom_api_config']['password'] = "123";
//save configuration in config.php file
$configuratorObj->saveConfig();

//================== To Retrieve ==================

$configuratorObj->loadConfig();

$username = $configuratorObj->config['custom_api_config']['username'];
$password = $configuratorObj->config['custom_api_config']['password'];