Lists the collaborators (contacts and contact groups) that have been granted access to a channel.

Results are scoped to what the authenticated user is allowed to see: account owners and managers see all collaborators, channel admins see all collaborators on their channels, and everyone else sees only the roles that grant them access.

Requires api token with one of the following permissions

Read all data

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 update permission on this channel can also
be used; a token granted only show on the channel lists no
collaborators.