when your stream goes offline.

### Stream Information
- `[[[event.broadcaster_user_id]]]` :: Your Twitch ID
- `[[[event.broadcaster_user_login]]]` :: Your username
- `[[[event.broadcaster_user_name]]]` :: Your display name
- `[[[event.broadcaster_user_avatar]]]` :: Your profile image URL

note: maps to the Twitch EventSub event `stream.offline`. Useful for logging, but viewers won't see alerts since the stream went offline.