https://www.gamespot.com/articles/free-call-of-duty-ww2-goodies-for-twitch-amazon-pr/1100-6458885/

Twitch/Amazon Prime members have yet another reason to be happy this month, because they can grab a new bundle of in-game loot for Call of Duty: WWII. All you need is an Amazon Prime account, a Twitch account, and a copy of the game on PC, PS4, or Xbox One. Once you link your accounts together, you can grab an Ultimate Supply Drop Pack for free. This is the sixth monthly freebie for Twitch Prime members with Call of Duty: WWII, and it's available between now and June 7.

To get your goodies, visit Twitch.tv and click the crown-shaped Prime Loot icon next to the search bar. That will open a drop-down menu, where you'll find your Call of Duty: WWII loot, along with any other free games and items you have available (more on that below).