code: def users(self, params):
          
          resource = self.RESOURCE_USERS.format(account_id=self.account.id, id=self.id)
          headers = {'Content-Type': 'application/json'}
          response = Request(self.account.client,
                             'post',
                             resource,
                             headers=headers,
                             body=json.dumps(params)).perform()
          success_count = response.body['data']['success_count']
          total_count = response.body['data']['total_count']
          return (success_count, total_count)
docs: This is a private API and requires whitelisting from Twitter.
          This endpoint will allow partners to add, update and remove users from a given
              tailored_audience_id.
          The endpoint will also accept multiple user identifier types per user as well.