Q:

How to get the login user through Rally App SDK

I created a custom html inside the Rally page using its App SDK. Now I want to get the username of the current login user. But I cannot figure out how to do that. 
I noticed Rally provides some Hangman Variables and current user name is one of them. But it seems it is only meaningful when we pass it as the parameter of some Rally API. However, I need to get the user name and use it in my javascript code. 
How can I do it?

A:

The hangman variables are treated as simple search and replaces by the server when serving up your app so you can put them anywhere in the source.
var user = "__USER_NAME__";

When your app runs the source would look like this:
var user = "vamcily";

In SDK 2.0 these hangmans are still available but are deprecated.  You can get information about the current user through the app context:
this.getContext().getUser();

