code: def this_month(self):
          
          if self._this_month is None:
              self._this_month = ThisMonthList(self._version, account_sid=self._solution['account_sid'], )
          return self._this_month
docs: Access the this_month
  
          :returns: twilio.rest.api.v2010.account.usage.record.this_month.ThisMonthList
          :rtype: twilio.rest.api.v2010.account.usage.record.this_month.ThisMonthList