code: def post_user_contact_lists_contacts(self, id, contact_list_id, **data):
          
          
          return self.post("/users/{0}/contact_lists/{0}/contacts/".format(id,contact_list_id), data=data)
docs: POST /users/:id/contact_lists/:contact_list_id/contacts/
          Adds a new contact to the contact list. Returns ``{"created": true}``.
          There is no way to update entries in the list; just delete the old one
          and add the updated version.