code: def _delete_record(self, identifier=None, rtype=None, name=None, content=None):
          
          to_delete_ids = list()
          if identifier:
              to_delete_ids.append(identifier)
          else:
              for record in self._list_records(rtype=rtype, name=name, content=content):
                  to_delete_ids.append(record["id"])
  
          for to_delete_id in to_delete_ids:
              self._request_delete_dns_record_by_id(to_delete_id)
          return True
docs: Deletes an existing record