I recently stole an iPhone from school's library?

I recently stole an iPhone from my school's library
i don't know whom it belongs to. I just ******* found it and took it. Fair enough i think!
the problem now is that i can't use it to download any apps and **** . It requires an ID:/
how can i get the ID and password to download apps from the ************* app store

First of all iPhones suck. Second, did you even take out the sim card? If it's verizon or sprint then they can track it. If it's AT&T, T-Mobile, or another GSM carrier then just take out the sim card and restore the phone via iTunes. Then either login using your apple id or create one if you don't already have one. OR you can just change the apple id without restoring the phone by going into settings > store. And don't even try to get the ID and password as if you find that, then you basically have the persons credit card number. Btw also log out of iCloud as if the person enabled the find my iphone option, then they can track it and disable it.

The second option is to be nice and give it to the school office. Also you can probably find out who's it is by looking in their contacts.