How to disable Apple ID prompt on iPhone?

Hi,

Your help would be most appreciated; thank you in advance.🙂

Suddenly my iPhone is demanding I login with Apple ID every single time I turn on my phone. It never used to do this, and I want to deactivate/disable/stop it! The only thing I did just before this happened was to explore Game Center. I'm wondering if that's connected, but not sure.

Please help me, as this is frustrating.😠

Thanks again,

Kcat😀