Ember build error: Unexpected token

I'm trying to get to grips with Ember 2.3.0 but I'm having trouble with the following piece of code:

route.js:

import Ember from 'ember';

export default Ember.Route.extend({

actions: {
    login: function() {
        this.store.query('user', {
            name: this.controller.get('name')
        }).then((users) => {
            if(users.get('length') === 1 {
                var user = users.objectAt(0);
                this.controllerFor('application').set('user', user);
                this.transitionTo('notebooks');
            } else {
                console.log('unexpected query result');
            }
        });
     }
   }
});

I get the following build error:

File: ember-note/login/route.js
ember-note/login/route.js: Unexpected token (9:33)
SyntaxError: ember-note/login/route.js: Unexpected token (9:33)
   7 |              name: this.controller.get('name')
   8 |          }).then((users) => {
>  9 |              if(users.get('length') === 1 {
     |                      ^

I'm sure an Ember pro will get this straight away. Cheers