I fixed my own issue just wanted to share the solution.
I successfully got all the way to getting Kodi google drive authentication code, then entered it on the deployed vercel page, but received a 403 error (Access blocked: [URL] has not completed the Google verification process).
I then added my email address (associated with the Google Drive being added) to:
Google Cloud > Oath Consent Screen > Audience > Test users > Add Users
And it finally worked!
Hope this helps.
I fixed my own issue just wanted to share the solution.
I successfully got all the way to getting Kodi google drive authentication code, then entered it on the deployed vercel page, but received a 403 error (Access blocked: [URL] has not completed the Google verification process).
I then added my email address (associated with the Google Drive being added) to:
Google Cloud > Oath Consent Screen > Audience > Test users > Add Users
And it finally worked!
Hope this helps.