Close the CBS auth channel and session asynchronously.

async def close_authenticator_async(self):
        """Close the CBS auth channel and session asynchronously."""
        _logger.info("Shutting down CBS session on connection: %r.", self._connection.container_id)
        try:
            self._cbs_auth.destroy()
            _logger.info("Auth closed, destroying session on connection: %r.", self._connection.container_id)
            await self._session.destroy_async()
        finally:
            _logger.info("Finished shutting down CBS session on connection: %r.", self._connection.container_id)