I need an Android developer to disect and understand an existing game

Hello, I need the help of an android developer to dive in and understand how an existing game, with its files and DB work. There is an Android game, that also works offline, that generates a unique player ID. I want to see if the possibility exists to edit the player ID or generate a new one without losing progress in the game. Since the player ID is generated offline, I assume that it should be editable in some way. If you have read this, let me know. I will remove generic bids.