Undefined error while exporting variable in Nodejs

This is my managedb.js

var Sequelize = require('sequelize-postgres').sequelize;
var postgres  = require('sequelize-postgres').postgres;

 var db = new Sequelize('test', 'postgres', 'postgres', {
  dialect: 'postgres'
});


var models = [
'user'
];

models.forEach(function(model) {
module.exports[model] = db.import(__dirname + '/' + model);
});



module.exports.db = db;

This is my user.js

var sequelize = require("sequelize");
var seq = require("./managedb");
var db = seq.db;

var Project = db.define('Project', {
  title: sequelize.STRING,
  description: sequelize.TEXT
});

I'm confused why I'm getting this error:

var Project = db.define('Project', {
                 ^
TypeError: Cannot call method 'define' of undefined

Why is this being caused? Am I exporting the variables wrong? Or do I've to add a db.sync() statement to managedb.js?