You will need to login to your Frontier Account. If you are seeing the message "Incorrect username or password", the term 'username' is referring to the email address of your Frontier account.
This includes physical codes have been handed out at PAX, Gamescom & EGX; PC gamer promotions and more!
Redeeming a gift key is separate to redeeming a product code to access the game. If you need to redeem a code to access the game then please head to the 'Product Access Key' page after logging into 'My Account' on the Frontier Store.