def get_conn(self) -> core.AzureDLFileSystem:
        """Return a AzureDLFileSystem object."""
        if not self._conn:
            conn = self.get_connection(self.conn_id)
            service_options = conn.extra_dejson
            self.account_name = service_options.get('account_name') or service_options.get(
                'extra__azure_data_lake__account_name'
            )
            tenant = service_options.get('tenant') or service_options.get('extra__azure_data_lake__tenant')

            adl_creds = lib.auth(tenant_id=tenant, client_secret=conn.password, client_id=conn.login)
            self._conn = core.AzureDLFileSystem(adl_creds, store_name=self.account_name)
            self._conn.connect()
        return self._conn