Your Apple ID is an email address used to login to your Apple devices. It is used to store content on the iCloud, buy songs from the iTunes Store, download apps from the App Store, and even purchase in-game currency for our games.
Important: you should never share your Apple log in information with anyone. Roadhouse employees will never ask you to provide your Apple ID or password.
You can visit Apple ID support for more information.
If you have downloaded the game with a different Apple ID than your current one you will need to log into the Apple ID used to purchase the game again in order to receive updates and make in-app purchases. Note that your progress in the game should not be affected unless you uninstall the game.