Error: Request had insufficient authentication scopes.

[yalegria]

Expected Behavior

Google Sheets API Quickstart not working after configuring and following instructions. I should be seen the list of Majors and I got an error "Error: Request had insufficient authentication scopes.".

Actual Behavior

It displays an error describe above.

JavaScript Console Output

Specifications

• Chrome or Firefox
• Windows

[yalegria]

Also, I can only select "External" user on the Consent Screen and added myself to the Test users.

[yalegria]

I got this to work but I would like to start all over from scratch (probably creating a new brand app in GCP) to ensure efficiency of the procedure.

This is what I did:

• Instead of trying to read a data from the quickstart demo, I did create my own spreadsheet under the gmail account I am using.
• Then I modified the quickstart javascript code to point to my sheet ID, specified new range based on dummy data.
• Signed out of the current session (!IMPORTANT) by pressing Sign out button on app.
• Authorize again using button on app, and indicated what the app will allow to do: reading spreasheets, etc.
• After continuing consent screen, page displays my dummy data.
• I brought back quickstart settings.
• Reload page and demo data displays on page.

I think the issue was that the current session was holding old authentication data, and it needed to re-authenticate (sign out) in order to grab new authentication data.

Again, I need to redo this once I get to a good point.