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Question

We have a Google Drive Oauth2 App integration. We are using Google Drive API export and get endpoints in order to read data from our customers within their Google Drive Fold

Answer 1

We managed to make it work again. We've found this: https://cloud.google.com/blog/products/application-development/upcoming-changes-to-the-google-drive-api-and-google-picker-api

Google didn't update their Drive API document, so we didn't know about this change.

Basically we have to switch from the access_token URL parameter to the Authorization Header. This is, to authenticate the API you should use the Header like this:

"Authorization" : "Bearer ACCESS_TOKEN"

This worked for us.

Thank you everyone for the help.