I installed a CH from debian repos (just copied from docs) and installation process asking me for a password, I typed my testing password ended by "();" witouth quotes.

After install I can access without any password.

users.xml show like "<password></password>" for default user.

¯\\\_(ツ)\_/¯

{
    po::options_description desc;
    desc.add_options()
        ("help,h", "produce help message")
        ("pid-path", po::value<std::string>()->default_value("/var/run/clickhouse-server"), "directory for pid file")
    ;
    po::variables_map options;
    po::store(po::parse_command_line(argc, argv, desc), options);
    if (options.count("help"))
    {
        std::cout << "Usage: "
            << (getuid() == 0 ? "" : "sudo ")
            << argv[0]
            << " status\n";
        return 1;
    }
    try
    {
        fs::path pid_file = fs::path(options["pid-path"].as<std::string>()) / "clickhouse-server.pid";
        isRunning(pid_file);
        return 0;
    }
    catch (...)
    {
        std::cerr << getCurrentExceptionMessage(false) << '\n';
        return getCurrentExceptionCode();
    }
}
int mainEntryClickHouseRestart(int argc, char ** argv)