docs: def verification_add(self, domain_resource_id, port, is_ssl):
          """
          Sends a POST to /1.0/verifications/ using this post-data:
  
              {"domain_href": "/1.0/domains/2",
               "port":80,
               "ssl":false}
  
          :param domain_resource_id: The domain id to verify
          :param port: The TCP port
          :param is_ssl: Boolean indicating if we should use ssl
  
          :return: The newly created resource
          """
          data = {"domain_href": self.build_api_path('domains',
                                                     domain_resource_id),
                  "port": port,
                  "ssl": 'true' if is_ssl else 'false'}
          url = self.build_full_url(self.VERIFICATIONS)
          return self.create_resource(url, data)