nexmo.php

<?php
return [

    /*
    |--------------------------------------------------------------------------
    | API Credentials
    |--------------------------------------------------------------------------
    |
    | If you're using API credentials, change these settings. Get your
    | credentials from https://dashboard.nexmo.com | 'Settings'.
    |
    */

    //'api_key' => 'API_KEY',
    //'api_secret' => 'API_SECRET',

    /*
    |--------------------------------------------------------------------------
    | Signature Secret
    |--------------------------------------------------------------------------
    |
    | If you're using a signature secret, use this section.
    |
    */

    //'api_key' => 'API_KEY',
    //'signature_secret' => 'SECRET'

];