docs: def get_sis_import_list(self, account_id, created_since=None):
          """
          Get SIS import list.
  
          Returns the list of SIS imports for an account
  
          Example:
            curl 'https://<canvas>/api/v1/accounts/<account_id>/sis_imports' \
              -H "Authorization: Bearer <token>"
          """
          path = {}
          data = {}
          params = {}
  
          # REQUIRED - PATH - account_id
          """ID"""
          path["account_id"] = account_id
  
          # OPTIONAL - created_since
          """If set, only shows imports created after the specified date (use ISO8601 format)"""
          if created_since is not None:
              if issubclass(created_since.__class__, basestring):
                  created_since = self._validate_iso8601_string(created_since)
              elif issubclass(created_since.__class__, date) or issubclass(created_since.__class__, datetime):
                  created_since = created_since.strftime('%Y-%m-%dT%H:%M:%S+00:00')
              params["created_since"] = created_since
  
          self.logger.debug("GET /api/v1/accounts/{account_id}/sis_imports with query params: {params} and form data: {data}".format(params=params, data=data, **path))
          return self.generic_request("GET", "/api/v1/accounts/{account_id}/sis_imports".format(**path), data=data, params=params, data_key='sis_imports', all_pages=True)