List webinar/meeting participants not returning user email

Hello there,

I use zoom Meeting SDK app Client Id and Client secret to generate the signature and join the webinar/meeting (I use web sdk 2.12.0 and from the client app I use ZoomMtg.join).

When calling ZoomMtg.join I provide userEmail as parameter.
After the webinar/meeting has ended I call zoom API to get the list of participants:

  1. GET /past_webinars/{webiarId}/participants
  2. GET /past_meetings/{meetingId}/participants

In the response I never get the user_email. Why is that field empty even though I provide userEmail when joining? How can I get that value?