Halo 5 redeemable code

Hey guys this is kinda halo related and at the same time it’s almost not. But there’s this thing where you play Halo 5 and you will recieve a code for a Warthog for Forza horizon 3. I don’t know where else to go but I have not recieved a code for the warthog nor have two of my other friends. If anyone has gotten said code and does not want it it would be greatly appreciated. Thank you

Hey OP, if you have played either MCC or Halo 5 then you will get a code as they are still rolling out. if for any reason you don’t get one, be sure to make a new post over here on the Xbox Live support forums
http://forums.xbox.com/xbox_support/xbox_one_support/f/4272.aspx

Details:
http://forums.xbox.com/xbox_support/xbox_one_support/f/4272/t/2207301.aspx