I’m a little bit confused about extensions JWT token, does it mean that I can use this token in order to access twitch api? e.g Get Streams endpoint. Thanks.
No. The JWT token either provides an opaque user ID, of if Auth’ed contains the users TwitchID.
The JWT is just a method to securely transfer the UserID/ChannelID/other data in the payload to your EBS.
It’s not a token or auth “key” for use with Twitch API