Can I get my subscriber list with a GET request only?

I was trying this

https://api.twitch.tv/kraken/channels/$username/subscriptions/?client_id=$client_id&secret_token=$oauth_token

also tried token instead of secret_token

I get 401 unauthorised in incognito mode, but it works (with ?client_id only) if I’m logged in to twitch

the token has no scopes