How to use the internetarchive.config.parse_config_file function in internetarchive

vid_meta['annotations'] in {'', EMPTY_ANNOTATION_FILE}) or
                check_is_file_empty(annotations_file_path))):
            os.remove(annotations_file_path)

        # Upload all files with videobase name: e.g. video.mp4,
        # video.info.json, video.srt, etc.
        files_to_upload = glob.glob(videobasename + '*')

        # Upload the item to the Internet Archive
        item = internetarchive.get_item(itemname)

        if custom_meta:
            metadata.update(custom_meta)

        # Parse internetarchive configuration file.
        parsed_ia_s3_config = parse_config_file(self.ia_config_path)[1]['s3']
        s3_access_key = parsed_ia_s3_config['access']
        s3_secret_key = parsed_ia_s3_config['secret']

        if None in {s3_access_key, s3_secret_key}:
            msg = ('`internetarchive` configuration file is not configured'
                   ' properly.')

            self.logger.error(msg)
            if self.verbose:
                print(msg)
            raise Exception(msg)

        item.upload(files_to_upload, metadata=metadata, retries=9001,
                    request_kwargs=dict(timeout=9001), delete=True,
                    verbose=self.verbose, access_key=s3_access_key,
                    secret_key=s3_secret_key)