Yeah, that's where I put it in.

Still says it's invalid but I went to the support page and found a statement saying this:

Early Access / Bonus codes can be redeemed beginning on or around June 18, 2015. The PC Early Access / Bonus code needs to be redeemed via the Mog Station, and the PlayStation®3 and PlayStation®4 codes need to be redeemed in the PlayStation® Store.
So maybe I should wait a couple more weeks?