I need to grant permissions to a user for my Firebase project. But this user should only have access to adding data on Real-Time Firebase Database. I think it should be done here:
User can only add and delete data in firebaseDatabase and nothing more here:
How do I set permissions for this user?
There currently is no way to give product-level permissions to a collaborator on the Firebase console. Either they have access to the console, or they don't have access. You can give them read-only access, but that doesn't sound like what you need.