def _credentials_found_in_envars():
        """Check for credentials in envars.

        Returns:
            bool: ``True`` if at least one is found, otherwise ``False``.

        """
        return any([os.getenv('PAN_ACCESS_TOKEN'),
                    os.getenv('PAN_CLIENT_ID'),
                    os.getenv('PAN_CLIENT_SECRET'),
                    os.getenv('PAN_REFRESH_TOKEN')])
Check for credentials in envars.

        Returns:
            bool: ``True`` if at least one is found, otherwise ``False``.