You can download Louis The Game on iOS and Android.
When you play the game, you may be rewarded with a golden postcard and a secret link to enter the contest.
From that page, all you have to do is login or signup on WENEW and click "Enter". Once entered, you'll have a chance to win one of 3 NFTs (10 editions each) based on Louis Vuitton's history. You will be notified via the email you registered with.