HTTP Error: 401 while setting up firebase cloud functions for android project

Use firebase login --reauth, that happened to me because an old FIREBASE_TOKEN was present while trying to exec firebase init

I solved it by manually deleting the FIREBASE_TOKEN from my environment variables, THEN issued a firebase login --reauth.

Note: I tried to re-authenticate without deleting the Firebase token first, but didn't work for me.

I solved the problem! you need to logout firebase logout then log-in firebase login again or just refresh the token with firebase login --reauth

it seems that the expiry time of Firebase auth token is limited to max 1Hr