nixos-server-conf/shared/dev_user.nix

{
  config,
  lib,
  pkgs,
  modulesPath,
  ...
}:
{
  users.users = {
    # connection only via hashed password;
    dev = {
      isNormalUser = true;
      home = "/home/dev";
      description = "User used to manually connect to this system (e.g. for maintenance)";
      extraGroups = [
        "docker"
        "wheel"
      ];
      hashedPassword = "$6$8Klm.W0rGVD3K1op$ZHWG0fB2UcM9HUsNqUHMevlz.lsnq3pMRSStukulksixACsGx5npNnecj/g7ndD5MbHBhXpBAkp0geyt0645P.";
    };
  };
}