After successfully installing ACLI on your machine, you can continue with authentication. This involves creating a site connection.
A site connection is a setting up of the URL and credentials used to allow ACLI to connect to an instance of a service such as Confluence, Jira, or http://Monday.com, so that ACLI can perform actions on it.
The video below walks you through the process of authenticating with ACLI.
https://fast.wistia.com/embed/medias/a60wbuq523.jsonp