Angular-Meteor $bindToContext doesn't seem to work

Has anyone tried to make this.$bindToContext to work?

Here’s my code:

Accounts.createUser { 'username': "Joy" 'password': "123" }, @$bindToContext((err) -> @isConnected = true return )

Don’t know how to indent here, but this is a coffeescript.

This doesn’t seem to work. @isConnected is not updating the template. Any thoughts or directions from your experiences? Thanks!