Question about Meeting > GET a user > pic_url endpoint

This may be truly impossible, but I thought I’d ask the community anyway – just in case. Is there a way – primarily using the pic_url value – to tell if that image was uploaded by the user, or is the ‘letter pic’ created by Google (or Zoom)?

The point being, I want to use the pic_url if it is an actual (uploaded) pic; and substitute it with a placeholder pic if it is just a Google (or Zoom) generated letter pic.