UPDATE 2022.01.14
How to remove your Apple ID (iPhone)
1: Remove your Apple ID from the app
Instructions
1-1. On your iPhone device, in the settings window, select the account.

1-2. Tap [Sign-in & Security].

1-3. Tap [Sign in with Apple ID].

1-4. Tap [NOBORI Service].

1-5. Tap [Stop using Apple ID].
