Clear all members from a contact list
Bearer authentication header of the form Bearer <token>, where <token> is your auth token.
ID of the contact list to clear
^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$External ID of the contact list to clear
Contact list cleared successfully