Twitch is just irc with an oauth token as password.

⚠️ Be warned though that twitch gets A LOT OF messages in almost any chatroom and this will be an issue for other bridges that will ratelimit/ban you.
So be sure to do this only in rooms with not much users

⚠️ To relay messages to Twitch, The Twitch user will require mod powers for the channel/streamer specified in the gateway settings.

Go to https://twitchapps.com/tmi/
This will get you an oauth token "oauth:yourtoken"
Paste the result in the config below

[irc.twitch]
#Add the oauth token here you got from https://twitchapps.com/tmi/
Password="oauth:yourtoken"
Nick="yournick"
Server="irc.chat.twitch.tv:6697"
UseTLS=true
RemoteNickFormat="[{PROTOCOL}] <{NICK}> "