Get user name in extension

[#1]

How can I get the user's name from the javascript code in my extension?

This is one of my first extensions, I appreciate any help.

[danielrozental]

Add an expression and then put osuser() in it.

[#3]

I actually need help in knowing how to do that and then how to read it from the javascript code in my extension. Sorry, very new to this.

[danielrozental]

There is an extension in the SDK that does just what you're trying to do.

You should check it out. Also check the tutorials and starting documents on extensions.