Ember currentUser observer

gistfile1.js

Ember.SimpleAuth.Session.reopen({
	updateCurrentUser: function() {
		var self = this;
		var userId = this.get('user_id');
		if (!Ember.isEmpty(userId)) {
		  container.lookup('store:main').find('user', userId).then(function(user){
		  	self.set("currentUser", user);
		  });
		}
	}.observes('user_id')
});