Hi all, I've built a custom Deluge function to route Zoho CRM Account attachments into specific Google Drive subfolders based on filename prefix. The CRM API steps all work correctly, however our first Google Drive API call (listing subfolders via drive/v3/files) is returning a 403 PERMISSION_DENIED - "Method doesn't allow unregistered callers" - despite the connection showing as Connected in Zoho.

Full context, connection config, error logs, and the relevant Deluge code are detailed in the post link pasted below. Any help would be greatly appreciated!