How to import users in Firebase using MD5 Hashing

firebaseImportUsersMD5.js

var crypto = require('crypto');
var fs = require('fs');
var exec = require('child_process').exec;
var uploadCommand = "firebase auth:import users.json --hash-algo=MD5 --rounds=0";

var stringToBase64 = function(plaintext){
  return new Buffer(plaintext).toString('base64');
}

var users = [
    {
      localId: "uid1",
      email: "test@test.com",
      emailVerified: true,
      displayName: "Test",
      password: "hellotest"
    },
    {
      localId: "uid2",
      email: "world@test.com",
      emailVerified: true,
      displayName: "World",
      password: "helloworld"
    }
  ];

for (var i = 0; i < users.length; i++){
  var salt = crypto.randomBytes(128).toString('hex');
  var hash = crypto.createHash('md5').update(salt+users[i].password).digest('hex');

  users[i].passwordHash = stringToBase64(hash);
  users[i].salt = stringToBase64(salt);
  delete users[i].password;
}

const content = JSON.stringify({users:users});
fs.writeFile("users.json", content, 'utf8', function (err) {
    if (err) {
        return console.log(err);
    }

    console.log("The file was saved!");
    console.log(uploadCommand)
    exec(uploadCommand,
    function(err, stdout, stderr) {
      console.log(stdout);
    });
});