# Instructions

1. For correct operation, you must enter the correct `API key` and `IPN Secret` parameters when installing the module.
2. The WHMCS admin panel `Setup -> General Settings` also come into effect, set the `URL address of the WHMCS system`, it is necessary for
   parvili display of the picture and ipmUrl. You need the path to index.php, for example: `https://example.com/whmcs` or
   `https://example.com`.