Login to your status page at instatus.com/login then choose your status page.
Click on the Subscribers tab, then Discord.
Click Add a discord server,
You'll be redirected to Discord where you'll be asked to authorize Instatus and add it to a server that you have Manage Server permission in, then members of your server can be alerted to any notifications.
You could delete this integration by clicking on it then clicking Unsubscribe.