sequelize can't hash password

I am having a issue trying to hash password using bcrypt-nodejs with sequelize, when i route to my register i don't get any response and no register is added to my database :/.

So my model is this:

    "use strict";
var sequelize = require('./index');
var bcrypt = require('bcrypt-nodejs');

module.exports = function (sequelize, DataTypes) {
  var User = sequelize.define("User", {
    username: DataTypes.STRING,
    email: DataTypes.STRING,
    password: DataTypes.STRING
  }, {
      instanceMethods: {
        generateHash: function (password) {
          return bcrypt.hashSync(password, bcrypt.genSaltSync(8), null);
        },
        validPassword: function (password) {
          return bcrypt.compareSync(password, this.password);
        }
      },


    });

  return User;
}

on my register route i try to hash the password and assing it to my password field like this:

var express = require('express');
var User = require('../../models').User;
var router = express.Router();

/* GET users listing. */
router.post('/', function (req, res, next) {
 console.log("hi");
  if (JSON.stringify(req.body) == "{}") {
    return res.status(400).json({ Error: "Register request body is empty" });
  }
  if (!req.body.email || !req.body.username || !req.body.password) {
    return res.status(400).json({ Error: "Missing fields for registration" });
  }
console.log(req.body.password);
  var password = User.generateHash(req.body.password);
  console.log(password);

  User.create({
    username: req.body.username,
    email: req.body.email,
    password: password
  }).then(function () {
    return res.status(200).json({message: "user created"});
  })

});

module.exports = router;

as i said i don't get any response from postman to the register route and nothing get added in the database, the problem just occurs when i add password, without the password field, the register get added :/.

thank you :)

via Antonio Costa