Nevermind, found it. It's on the Redeem page - not in an email.
i got the email, clicked the link, logged on.
but there is no code there, just a box asking me to enter a redeem code.
Edit: Nevermind aparently on the Desktop app i was logged in using steam, and on the website through an account i created, both use the same email.
once i logged into the website through steam the key showed up.