How/Where to claim Steam Key on release

Hi! It's my 1st time purchasing a game through GamesPlanet here, and I had a question.

I know tomorrow emails will be sent to us notifying us when the game is available. But will the Steam Keys be in those emails? Or will we all need to sign in to GamesPlanet and claim it within our account somewhere?

Appreciate any help on what I'll need to do come tomorrow! So excited!!