When entering the game for the first time, you will be able to create a new account using an email address, Apple ID, or Facebook profile.
If you have created your account with an email address or Apple ID and you want to link it to a profile on the social network, you must click on the "Play" button that you will find on your home screen. Once you do, a new pop-up screen will open from which you can select an opponent and, at the bottom, you will see the caption “Play with your Facebook friends”.
By selecting this option, you will be redirected to the social network to confirm the linking of your account.
In case you later want to unlink your Facebook account, you will have to do it from the social network. To do this, go to Settings and privacy > Settings > Permissions > Apps and websites. You must select "Trivia Deluxe" and press the "Delete" button.