As documented:
curl -H ‘Accept: application/vnd.twitchtv.v5+json’ \ -H ‘Client-ID: uo6dggojyb8d6soh92zknwmi5ej1q2’ \ -H ‘Authorization: OAuth cfabdegwdoklmawdzdo98xt2fo512y’ \ -X GET ‘https://api.twitch.tv/kraken/channel’
Yon need a V5 accept header
And your Authorization header should have it’s token preceeded by oAuth