Your Support Code will be an alphanumeric code that will identify you as a player in The Win Zone.  You can find yours by logging into your game, then navigate to the top right corner of your screen and tap on the hamburger menu(Three parallel lines), tap on account, and you will find your unique Support Code right above your name.  You will need your Support Code for a few different reasons, including when you need to reach out to customer support as they will need this to identify you.