Hello! If you need to sign out of your Apple ID on an iPhone 8 because you're being prompted for a password from a Pogo app, you can follow these steps to sign out:
1. Go to the "Settings" app on your iPhone 8.
2. Scroll down and tap on your name at the top of the screen.
3. Scroll to the bottom of the page and tap "Sign Out."
4. Enter your Apple ID password and tap "Turn Off."
5. You will be signed out of your Apple ID on that device.
This will sign you out of your Apple ID on the iPhone 8. Keep in mind that signing out will also disable services like iCloud, iMessage, FaceTime, and other Apple services on that device.