Retrieve traffic breakdown analytics for a webinar, grouped by a specified dimension
such as UTM campaign, UTM source, UTM medium, or referrer domain.

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.