How to use the pygerrit2.HTTPDigestAuth function in pygerrit2

level = logging.DEBUG if options.verbose else logging.INFO
    logging.basicConfig(format="%(asctime)s %(levelname)s %(message)s", level=level)

    if _KERBEROS_SUPPORT and options.kerberos_auth:
        if options.username or options.password or options.basic_auth or options.netrc:
            parser.error(
                "--kerberos-auth may not be used together with "
                "--username, --password, --basic-auth or --netrc"
            )
        auth = HTTPKerberosAuth(mutual_authentication=OPTIONAL)
    elif options.username and options.password:
        if options.netrc:
            logging.warning("--netrc option ignored")
        if options.digest_auth:
            auth = HTTPDigestAuth(options.username, options.password)
        else:
            auth = HTTPBasicAuth(options.username, options.password)
    elif options.netrc:
        if options.digest_auth:
            auth = HTTPDigestAuthFromNetrc(url=options.gerrit_url)
        else:
            auth = HTTPBasicAuthFromNetrc(url=options.gerrit_url)
    else:
        auth = None

    rest = GerritRestAPI(url=options.gerrit_url, auth=auth)

    try:
        query = ["status:open"]
        if auth:
            query += ["owner:self"]