Rising Storm 2: Vietnam Closed Beta Code Giveaway

https://www.gamespot.com/articles/rising-storm-2-vietnam-closed-beta-code-giveaway-p/1100-6449985/?ftag=GSS-05-10aaa0b

Hello,

i receive a email with this subject "Here's your closed beta code for Rising Storm 2: Vietnam (PC)", but the code doesnt appear on the email. How do redeem my code.

Thanks