code: def find_usage(self):
          
          logger.debug("Getting usage for Lambda metrics")
          try:
              self.connect()
              resp = self.conn.get_account_settings()
          except EndpointConnectionError as ex:
              logger.warn('Skipping Lambda: %s', str(ex))
              return
          self.limits['Function Count']._add_current_usage(
              resp['AccountUsage']['FunctionCount'])
          self.limits['Total Code Size (MiB)']._add_current_usage(
              int((resp['AccountUsage']['TotalCodeSize'])/1048576))
          self._have_usage = True
docs: Determine the current usage for each limit of this service,
          and update corresponding Limit via
          :py:meth:`~.AwsLimit._add_current_usage`.