Solution: I found a Passport JS strategy for the new Helix API (https://www.npmjs.com/package/passport-twitch-new), only thing to note is that the optional scope: "user_read" should be empty as that syntax is no longer used (works with it anyway).
Solution: I found a Passport JS strategy for the new Helix API (https://www.npmjs.com/package/passport-twitch-new), only thing to note is that the optional scope: "user_read" should be empty as that syntax is no longer used (works with it anyway).