onUserstate

Warns if we're not a moderator when we join a home channel.

"You will not get USERSTATE for other people. Only for yourself." https://discuss.dev.twitch.tv/t/no-userstate-on-people-joining/11598

This sometimes happens once per outgoing message sent, causing it to spam the moderator warning.

version(TwitchSupport && WithTwitchPlugin)
private
void
onUserstate