Can not enter discount code on steam launcher

[frenesba]

Hi im triying to buy a new membership trough this: "Weekend only - save 20% on all memberships and membership bundles with the discount code BLACKFRIDAY"
But sadly theres no "Enter discount code" box on the steam launcher so if i try to buy it it shows the full price of the bundle membership.
So if anyone knows a workaround it would be appreciatted Thanks

[Bonaventura]

Try the website directly (www.thehunter.com) instead of the launcher.

[frenesba]

Thanks but that doesnt help for me since it wont let me use my steamwallet.