This function unregisters a Passenger application on an account.
Note:
uapi --output=jsonpretty \ --user=username \ PassengerApps \ unregister_application \ name='slippers'
{- "apiversion": 3,
 - "func": "unregister_application",
 - "module": "PassengerApps",
 - "result": {
- "data": null,
 - "errors": null,
 - "messages": null,
 - "metadata": { },
 - "status": 1,
 - "warnings": null
 
} 
}