The Twitch module has several options for sending messages on changes of a streamer.
Note that you have to authorize yourself first in the settings to be able to use the Twitch module.
You can set the username, the channel, the trigger and the message which is sent to the selected channel once the trigger is triggered.
stream.online: Triggered when the streamer starts it's livestream
stream.offline: When the streamer stops it's livestream
channel.update: When the user updates it's channel
channel.raid: When the channel is raided
user.update: When the user updates it's public account data
You can create up to 10 triggers per server.
That means, if you create
stream.offline triggers for every streamer you want to be notified for, you can currently add up to 5 streamers per server.