def METHOD_NAME():
    """Get the project id from the metadata server.
    Returns:
        str: The of the project id, on error, returns None.
    """
    path = '/computeMetadata/v1/project/project-id'
    try:
        http_response = _issue_http_request(
            HTTP_GET, path, REQUIRED_METADATA_HEADER)
        return http_response.read()
    except errors.MetadataServerHttpError:
        LOGGER.exception('Unable to read project id from metadata server.')
        return None