OneLogin + CodeIgniter

Hi,

I'm very new on using CodeIgniter framework, but I have a task to integrate OneLogin SSO for a PHP web app using CodeIgniter framework, I already searched the web for some example regarding this task, however, it only shows super basic example (https://developers.onelogin.com/saml/php). I was just hoping if there is someone out there that have already worked on a task similar to this.
Note: The setup would be OneLogin as the only sign in/sign out functionality, there exists a dashboard/landing page upon success login, and all other pages should only be accessible once logged in.

Thanks.