To integrate with CheckMobi validation, you must first follow these steps under your CheckMobi dashboard.
Goto Settings → Account, Add new app, use any name for the app
Reload the page and expand Settings on the side bar menu and you should now see the new app you just added.
Now click on Add secret key to generate a new key to use with the WHMCS Module
Now you can make any additional changes you want for this app. The settings you want to modify is the SMS and IVR
Copy and paste the secret key for the app and fill it in to WHMCS → Setup → Addon Modules → KeysProvider Configure → CheckMobi Key
The configuration for CheckMobi is now complete.