To get subscriptions status, requires an oAuth token from the broadcaster, with the relevant scopes attached
So if you want to see if I am subscribed to CohhCarnage and/or Lirik, you need
- A token from CohhCarnage
- A token from Lirik
- My userID, (usually got from asking me to login to your site)
So you need user access tokens from the broadcaster you want to lookup against. A “privileged” access token is generated the same way as you would a “non privileged” token.
A more lengthy answer to the same question is on Check if user is subscriber