Retrieve caption token via API

I need to be able to retrieve the caption token of webinars, and hopefully meetings as well, via the API.

This is the token I am speaking of: https://support.zoom.us/hc/en-us/articles/115002212983-Integrating-a-third-party-closed-captioning-service

I was hoping it would be a property returned in /webinars/{webinarId}

But I am not finding it.

I need to be able to retrieve this token to feed into our systems to integrate closed captioning. Currently, it is a manual process for us and for our clients, but I am able to retrieve everything else I need to know about webinars via the API, save for this.

Thank you for any insights you can offer.

Thank you.