Run bot on every channel it has mod on

I don’t understand what you’re asking.
Usually a user connects to your site, lets call them user123.
user123 clicks a button on your site asking the bot to join their channel.
your bot executes the command join #user123, and is now running on their channel.

Which is why when a user requests a bot to join their channel you update that array, so if it does need to restart it will know what channels it should be in.