user ';' KEY ( ';' DEFAULT )?

public String _user(String[] args) throws Exception {
	Macro.verifyCommand(args, "${global;<name>[;<default>]}, get a global setting from ~/.bnd/settings.json", null,
			2, 3);

	String key = args[1];
	if (key.equals("key.public"))
		return Hex.toHexString(settings.getPublicKey());
	if (key.equals("key.private"))
		return Hex.toHexString(settings.getPrivateKey());

	String s = settings.get(key);
	if (s != null)
		return s;

	if (args.length == 3)
		return args[2];

	return null;
}