Hey @Enrico6, help's here.
As this help article explains, please make sure to follow these steps to link your Spotify account:
- Open the Google Home app and tap Settings.
- Select Accounts, then Spotify. You’re directed to link accounts.
- Select Link Accounts, then Log in to Spotify.
- Enter your login details. Your Spotify account is linked to Google Home.
- Ask Google Assistant to play music (“Ok Google, play Spotify”).
Check the same help article for further assistance.
Hope that helps! 🙂