I have a few apps under my personal firebase account for testing, but now need to transfer an app to a client\'s account for billing purposes. Is this possible?
Than
If FirebaseDatabase.instance.reference() is giving you the reference from the old database already deleted try this:
Change the name of your "package_name": "com.old.appname" on all occurrences to be different from the old one.

com.old.appname and change all occurrences to com.new.appname