My local android app is synced up in google firebase console with my SHA key configured in google.services.json. How do the developer on other end can setup the project to u
Solution:
So for other developers, generate the SHA-1 Key as described in the picture
Go to Firebase Console:
A solution for the comment: So the answer is well written in the error. You can't have two projects of the same package name. Even if you delete it. It will take a least 4-5 days to get deleted fully from the developer's console.
So the only solution is to generate a new SHA-1 key by custom signing the app by generating a signed apk from the android studio. Or just create a new project with different package name both ways will work for now.
Hope this info helps. Do let me know if it changes anything for you.