How can I set all route have the same method or action when I use ember?

My ember application use 1.11.3 version and ember-simple-auth(0.7.3). All of route must set the AuthenticatedRouteMixin and get the account infomation use beforeModel, I think is not good way to do this. Example:

App.Route = Ember.Route.extend(AuthenticatedRouteMixin, {
  beforeModel: function() {
    Account.find().then(function(user) {
      this.set('user', user);
    })
  },
  setupController: function(controller, model) {
    controller.set('model', model);
    controller.set('user', this.get('user'));
  }
});

App.ApplicationRoute = App.Route.extend();

I set a jsbin: http://ift.tt/1B4CZlA

If my all route use App.Route.extend();, it is has problem is AuthenticatedRouteMixin can not work.

I use Route.extent set all to route beforeModel to get the account infomations is a good way?

Maybe there is any better way to approach this problem?