Retrieve audience data for a webinar. Returns a paginated list of
registrants with their attendance status, engagement metrics,
attribution data, and per-attendee histograms.

Requires api token with one of the following permissions

Read detailed stats

Tokens with the "Act with a team member's permissions" permission
(all:delegate_to_contact_permissions scope) can also be used. Requests
made with such a token are authorized using the permissions of the
contact assigned to the token.

An expiring access token
created with the all:delegate_to_contact_permissions scope and an
authorization granting the view-stats permission on this webinar can also
be used.