If you wish to play Empires & Puzzles using a different Game Center account, please follow these steps to switch your account:
  1. Go to Device Settings > Scroll down & Select the Game Center
  2. In the Game Center view, you will see the currently used Game Center Profile username in blue lettering
  3. To deselect this profile, toggle the Game Center tab from green to white
  4. Then select 'Not 'Your Game Center Account'
  5. Enter the Apple ID and Password of the Game Center Account you wish to use. You will then be logged into a different Game Center account.
If you have forgotten this, tap 'Forgot Apple ID', and the Apple Support will help with this.