C# Update Game & Title forbidden

API
5

Oh yes sorry, I forgot to tell about that. I already visited that link (actually I’m using the public documentation all the time) and I also saw I need that scope.
That’s my request url:

https://id.twitch.tv/oauth2/authorize?response_type=token&client_id=“myClientID”&redirect_uri=http://localhost:8243&scope=chat:read+chat:edit+channel:moderate+user_read+channel_editor

That should be fine, or am I wrong? The channel_editor scope is also included.