Webinars - Participant's start_time and end_time

Hi, I was trying to access via API the participant’s information of a given Webinar. When I generate the CSV report on my dashboard, the time that the participant started watching the webinar is there. But, when I list the participants of the same webinar, using the API, I am not able to find this information. Only generic information, like email, first_name, zip code, etc… Is it not possible?

I’m using PHP and JWT. The endpoint that I was consuming is: https://api.zoom.us/v2/webinars/webinarID/registrants

Can someone help me?