Signing in to Game Center
Sign in: Open Game Center. If you see your nickname and photo at the top of the Me screen,
you’re already signed in. If not, enter your Apple ID and password, then tap Sign In. Or, tap Create
New Account to create a new Apple ID.
Add your photo
Tap the photo next to your name.
Declare your status
Tap Me, tap the status bar, then enter your status.
View your account settings
Tap Me, tap the account banner, then choose View Account.
Tap Me, tap the Account banner, then tap Sign Out. You don’t need to sign
out each time you quit Game Center.