Google Calendar Authentication issues

I have had the Google Calendar configuation running fine. It suddenly asked for reauthentication and now I cannot get it to accept the OAuth credentials.

I have tried deleting the credentials, on setting up the integration again, it saves the credentials but the call to Google throws a 400 eeror. I have seen this before with OAuth when the browser URI and return URI are different.

Any suggestions how to fix?

I’m still having issues with verification of Google integrations, Anyone any suggestions?

The issue is I cannot get rid of old invalid credentials and I cannot find where they are stored to delete them.

Issue raised No way to renew Google Credentials · Issue #137175 · home-assistant/core