createRecord not defined error (Firebase + Ember.js)

I was wondering if anyone could point me in the right direction and help me fix this error I'm getting when I attempt to add a user with my Ember.js model after created a user with Firebases createUser method.

App.SignUpController = Ember.Controller.extend({
needs: ['sign-in'],
needs: ['application'],
userSignedIn: false,


actions: {
    signMeUp: function() {
        var state = false;
        var controllerContext = this;
        // Create firebase user
        ref.createUser({
                email    : this.get('email'),
                password : this.get('password'),
            }, function(error, user) {
                if (error === null) {
                    console.log('User created with id', user.uid);
                    state = true;
                    controllerContext.set('userSignedIn', state);
                    console.log("State from sign-up page: "+ state);

                    console.log("Testing user.uid inside: "+user.uid);
                    var fbid = user.id;
                    controllerContext.set('user id', user.uid);

                    var newUser = this.store.createRecord('user', {
                          id: fbid,
                          email: this.get('email'),
                          password: this.get('password'),
                    });
                    newUser.save();
            } else {
                    console.log("Error creating account:", error);
            }
        }); // End createUser

        this.transitionToRoute('letters');
    }
}
 });