I have a simple asp .net core application which was built based upon our sample code.

I authorized the user and accessed the users profile data. Then i went to my account permissions and removed the applciations access.

At this point if i had been using a installed application the library would pop up and request access again. In this case the application crashes.

GoogleApiException: Google.Apis.Requests.RequestError
Request had invalid authentication credentials. Expected OAuth 2 access token, login cookie or other valid authentication credential. See https://developers.google.com/identity/sign-in/web/devconsole-project. [401]
Errors [
Message[Invalid Credentials] Location[Authorization - header] Reason[authError] Domain[global]
]
Google.Apis.Requests.ClientServiceRequest.ParseResponse(HttpResponseMessage response)

Clearing the cookies in the web app did fix this.

My question is this an issue with the library that we are forcing a clear, or is this something we need to recommend that users catch some how to force a clear of the cookies so that the user does not get an error in this manner?

Im really not a web dev so i guess i am fishing for opinions on how best to advice our developers.

I have cross posted this here How to catch authorization fail, clear cookies and request access again