How to stop the Apple ID Password Pop-up from pooping up on my iPhone?

So I have a little problem with my iPhone and I was wondering if you could help me. I had to replace mine today because it fell whole screen shattered. It sucked. So I bought from the Apple Store in Freehold a replacement and I restored it to my old one. Everything was great but this stupid pop-up window keeps popping up like every 5 seconds that says "Apple ID Password" and it has an email address and asks for the password but I don't even know whose email address it is so I can't give a password so I hit cancel but then after i go through like 20 or so pop-ups and hit cancel on each they start again and again and I'm beyond annoyed. I was wondering if you knew what the F was going on because I have no *** clue and I leave for school tomorrow evening so I kind of want it fixed haha. Let me know if you have any way to make it stop but if not I can go back to the Apple Store and they can figure it out.

Go to settings and change the email