Webinar attendee join without name

[cholscher (Carl)]

Description
We have a webinar attendee that joined without a name. The API returns no useful information about this attendee.

Error
When I run https://api.zoom.us/v2/metrics/webinars/$webinarID/participants?type=live&page_size=300 for the Webinar ID 85395352710, one of the attendees returned shows this for a live event in progress.

         "data_center" : "United States (NY Top)"
     "device" : "Unknown"
     "domain" : ""
     "harddisk_id" : ""
     "id" : "LWDJZ2yaRT6_-s2o6_1K2g"
     "ip_address" : "157.131.253.41"
     "join_time" : "2020-11-03T17:33:01Z"
     "location" : "Berkeley (US)"
     "mac_addr" : ""
     "network_type" : "Wired"
     "pc_name" : ""
     "recording" : false
     "share_application" : false
     "share_desktop" : false
     "share_whiteboard" : false
     "user_id" : "16858112"
     "user_name" : ""
     "version" : ""
  }

Which App Type (OAuth / Chatbot / JWT / Webhook)?
JWT

Which Endpoint/s?
https://api.zoom.us/v2/metrics/webinars/$webinarID/participants?type=live

How To Reproduce (If applicable)
Steps to reproduce the behavior:

1. Run API request for Webinar ID
2. Look through list of attendees to find the one with the missing user_name field.

Screenshots (If applicable)

This is how the attendee appears in Zoom Webinar.

Additional context
How can I determine who this person is and how did they enter without a name or email address?

[will.zoom (Will)]

Hey @cholscher,

Thanks for raising this with us—I’m looking into this for you (ZOOM-213900).

I’ll follow up with you here to let you know what I find.

Thanks,
Will