Captative: How to handle sessions between external app

Hi,

I got a web application in Angular 6. I'm loading some captative courses from an external AWS storage into an iframe in my website.

I need to find a way to manage sessions and variables thought cookies so I can flag what the logged user has seen as well as what courses he has competed, keeping in mind that there might be many users in a single computer, so the cookies must be exclusive for each user.

Is there a way to achieve this using Captative, maybe with JS?

Thank you.