It’s neither
- Identifies the session using this JWT. Any token generated by your EBS should leave this field blank. When present, the value is interpreted as follows:
- Values beginning with “U” are stable references to a Twitch account across sessions and channels. You can use them to provide persistent services to users.
- Values beginning with “A” are transient references to an anonymous Twitch session; the user has not logged into the Twitch website. These values are not stable and should never be associated with persistent data. It is possible for them to represent different users over time. If your extension requires a stable user identity, your front-end interface should display an appropriate login request when this field does not begin with “U.”
- Broadcasters’ tokens are set with “U” + their Twitch user IDs, to avoid confusing opaque IDs with user IDs when the broadcaster is a viewer.