I've created a few Google Analytics V4 only properties a while ago.
Big mistake.
I'm using Google Spreadsheets to track the progress and such, and had to waste time migrating the API for it using OAuth2 and the Google Analytics Data API (GA4)
All went fine. Until a few weeks ago when it stopped working. I see there's a new version, Google Analytics Reporting API v4
I've procrastinated, so I'm doing the migration now, but hit a brick wall:
"User does not have sufficient permissions for this profile."
I don't understand why I get this issue. Remade the credential in the developer console, redone the Oauth2 process, recreated the tokens, checked everything still this issue.
So I decided trying the "Try this API", I get into the same issue
Which is weird, I'm logging in using the analytics admin account. Also this error is weird:
"This error may be due to using an insufficient credential type. Try using OAuth 2.0.",
since I'm basically logging in using the provided pop-up
The view id I took from here:
I've tried with any ID I could find (yeah, even MEASUREMENT ID and STREAM ID) and multiple sites (views)
What am I missing?



