Sharing an Ember Object between controllers with ember-cli

I'm trying to share a Ember object between different controllers in order to 'decorate' it with more information as you go through the app.

In a simple Ember app I would just do:

App.UserDetails = Ember.Object.extend({name: 'Darryl', age: 26 });

App.DetailsRoute = Ember.Route.extend({
  model: function () {
    return App.UserDetails;
  }
});

App.AccountRoute = Ember.Route.extend({
  model: function () {
    return App.UserDetails;
  }
});

But I can't see I would organise this in Ember CLI

Thanks