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)\_/¯

}
        if (!pid)
        {
            auto sh = ShellCommand::execute("pidof clickhouse-server");
            if (tryReadIntText(pid, sh->out))
            {
                fmt::print("Found pid = {} in the list of running processes.\n", pid);
            }
            else if (!sh->out.eof())
            {
                fmt::print("The pidof command returned unusual output.\n");
            }
            WriteBufferFromFileDescriptor stderr(STDERR_FILENO);
            copyData(sh->err, stderr);
            sh->tryWait();
        }
        if (pid)
        {
            if (0 == kill(pid, 0))
            {
                fmt::print("The process with pid = {} is running.\n", pid);
            }
        }
        if (!pid)
        {
            fmt::print("Now there is no clickhouse-server process.\n");
        }
        return pid;
    }
    int stop(const fs::path & pid_file, bool force)