[2019] I dont have Hot Hot Wheels code in my 5 HW Rocket League pack

What should I do? I bought the pack includ for the code. Maybe I'm blind and someone will explain me what to do?sry, thats my first post here
Help me to up

https://i.redd.it/itaorczoo8o21.jpg

https://i.redd.it/dsl8sdzoo8o21.jpg

https://i.redd.it/js7ea8zoo8o21.jpg