Passportjs and Postgres TypeError using sequelizejs - postgresql

Question

I am trying to authenticate using passportjs/sequelize but keep getting a typeError here :
TypeError: undefined is not a function
at module.exports.getUser (/Users/ra/Desktop/jb/controllers/users.js:44:12)
at Layer.handle [as handle_request] (/Users/ra/Desktop/jb/node_modules/express/lib/router/layer.js:95:5)
at next (/Users/ra/Desktop/jb/node_modules/express/lib/router/route.js:131:13)
at Route.dispatch (/Users/ra/Desktop/jb/node_modules/express/lib/router/route.js:112:3)
at Layer.handle [as handle_request] (/Users/ra/Desktop/jb/node_modules/express/lib/router/layer.js:95:5)
at /Users/ra/Desktop/jb/node_modules/express/lib/router/index.js:277:22
at param (/Users/ra/Desktop/jb/node_modules/express/lib/router/index.js:349:14)
at param (/Users/ra/Desktop/jb/node_modules/express/lib/router/index.js:365:14)
at Function.process_params (/Users/ra/Desktop/jb/node_modules/express/lib/router/index.js:410:3)
at next (/Users/ra/Desktop/jb/node_modules/express/lib/router/index.js:271:10)
at Function.handle (/Users/ra/Desktop/jb/node_modules/express/lib/router/index.js:176:3)
at router (/Users/ra/Desktop/jb/node_modules/express/lib/router/index.js:46:12)
at Layer.handle [as handle_request] (/Users/raDesktop/jb/node_modules/express/lib/router/layer.js:95:5)
at trim_prefix (/Users/ra/Desktop/jb/node_modules/express/lib/router/index.js:312:13)
at /Users/ra/Desktop/jb/node_modules/express/lib/router/index.js:280:7
at Function.process_params (/Users/ra/Desktop/jb/node_modules/express/lib/router/index.js:330:12)
Here is what the controller looks like:
getUser: function(req, res) {
User.find({
where: {
username: req.params.id,
displayName: req.user.displayName
}
}).success(function(User) {
res.send(User);
});
},
This is the get request from passport after authentication
app.get('/auth/facebook/callback',
passport.authenticate('facebook', {
failureRedirect: '/login'
}),
function(req, res) {
console.log(req.user.username)
res.cookie('signIn', 'true');
res.redirect('/api/users/' + req.user.username);
}
);