I am using google cloud auth for signing my requests for a firebase based project. Until yesterday it worked seamlessly, after using the gcloud auth print-identity-token I have received a token for the selected project and account. Yesterday after a restart this functionality stopped working. I still receive a token and the gcloud seems to be configured well(re-initialised it, and tried to completely uninstall/install it), but the returned token has different aud field. Therefore my firebase functions consider my requests as unauthenticated. let me paste the error message below:
Failed to validate auth token. FirebaseAuthError: Firebase ID token has incorrect "aud" (audience) claim. Expected "xyzmyproject" but got "32512345659.apps.googleusercontent.com". Make sure the ID token comes from the same Firebase project as the service account used to authenticate this SDK
I have checked the identity token via jwt.io and the aud is set to the wrong 32512345659.apps.googleusercontent.com value as the error message describes it.
Furthermore while was investigating I found out that the gcloud auth login command redirects me to the url the client_id is specified as 32512345659.apps.googleusercontent.com.