Add WHMCS single login details

Step 1] Install WHMCS on your domain.

Step 2] Login to WHMCS admin panel.

Step 3] Go to Setup→General Settings→Security→API IP Access restriction

(Domain IP is to be added here)

Step 4] Log-in to the manage portal.

Domain: Domain for which WHMCS single login settings are to be done is to be selected from the drop down.

Billing url: WHMCS URL is to be added for the Billing url.

Admin username:  The admin username for WHMCS is to be specified here.

Admin password: The admin password for WHMCS is to be specified here.

API key: The API key for WHMCS is to be mentioned here.

Status: The status can be either enabled or disabled from here.