After I created the !join command with a Twitch bot, how do I get the bot to join the people's channels again after it is turned off and turned back on?

What I want to be able to do is get the text that is being said on the website and be able to make my Twitch bot say it.

www.decapi.me/twitch/uptime.php?channel="CHANNEL_NAME"

I barely understand coding but I really want to make an uptime command for Twitch. Can someone please help me?