Firebase auth of my Android app was not working after publishing it 🤷♂️. After all, I figured out that Google Play will produce a new fingerprint for publishing apps. Here is the way to find the fingerprint and set it on Firebase project and Facebook.
https://hankli0130.medium.com/mom-my-firebase-auth-is-not-working-after-publishing-on-google-play-db56c055de2c
