automagically load user data if a user ref is present

[mazondo]

Need to give the user access to a userData or currentUser object that gives them all of the user's data. Should use the stretchr resource class so that it can be interacted with.

[matryer]

Perhaps we could have this kind of interface:

stretchr.getUser({
  success: function(user, response){
    // do something with user
  }
})

[mazondo]

Would this just be the normal thing? and if it's already loaded it fires success immediately?