So yes, go to code history and click redeem but the problem is this for a lot of people ###Platforms.None### error. It says we need linked account that has played destiny but we do, or at least we think we do. I have found NO conclusion to this problem and my only resolve is that you have to level up your character in-game more before you can get the engrams. After all, it does seem kind of OP if you're getting rare engrams right off the bat so maybe there is a level meter you need to reach.