I cant find my product code!

I downloaded Star Wars Battlefront from origin last night but cannot find the product code.I can play the game, but I need the product code in order for my brother to play in on his log on. I have looked everywhere for the product code but I cannot find it. Its not in the email receipt, or the order history, or the game details. I downloaded the game straight from origin so why is it not there. Someone please help!