WHMCS Installation and Activation
Go to your WHMCS Installation and navigate to /modules/gateways/.
Go to zitopay_whmcs/whmcs/modules/gateways on the extracted folder and Upload the zitopay.php file.
The Zitopay whmcs module contains a callback to receive and handle notifications on whether a payment is successful or failed. To install the callback, go to your WHMCS home page and navigate to /modules/gateways/. Go to zitopay_whmcs/whmcs/modules/gateways/callback on the extracted folder and Upload the zitopay.php file.
Once uploaded, navigate to Setup > Payment Gateways to activate and configure the Zitopay module.