Google Sheets Integration & Secrets

Greetings - Need some assistance please. We have a 3dr party application embedded in the Wix iFrame which is dependent on Google Authentication. The embedded page only loads if the end user has Google Sheets shared access. I would like to pass Google sheets credentials (secrets) upon page load vs. onClick. I have installed the “Google Sheets Code Package” and followed directions in the “Readme.md” file … stuck on what to use after the onReady - have tried several variations to no avail.

import { getValuesWrapper } from ‘backend/googlesheet-wrapper.jsw’ ;

$w. onReady ( function ()

Thank You