Sorry I meant state not scope:
https://github.com/justintv/Twitch-API/blob/master/authentication.md
https://api.twitch.tv/kraken/oauth2/authorize
?response_type=code
&client_id=[your client ID]
&redirect_uri=[your registered redirect URI]
&scope=[space separated list of scopes]
&state=[your provided unique token]
State ^^ scope is for permission requests!