Redeem Steam key to account with Steam OpenID like Humble Bundle

Humble Bundle has started requiring the user to sign in through Steam's OpenID authentication where it then redeems the Steam key on the user's account. I was unable to find any documentation on this

Free Game Redemption Instructions – Humble Bundle

How to Buy a Humble Bundle and Redeem It on Steam

Steam is removing support for OAuth, causing Humble Bundle to

Redeem Steam key to account with Steam OpenID like Humble Bundle

I randomly got this message today for a game I got in a Humble

Humble Bundle now tying Steam account - no Steam keys - Humble

How to Buy a Humble Bundle and Redeem It on Steam

Account got Hijacked - Please DON'T make my mistake!

vocab.txt · VMware/vinilm-2021-from-large at

PSA] Humble Bundle ran out of Steam keys for Back 4 Blood : r

Steam (service) - Wikipedia

strong-named-version-hell/src/MahApps.Metro.IconPacks.NewFormat

Steam: How to activate a Game / redeem a Steam key? - Epic Bundle