Unable to Authenticate - 401 Unauthorized

The first thing I noticed is that you're making the call to the staging community, but you have not specified a basic authentication header.

Most staging communities have basic authentication turned on by default. You see this in the browser when you first navigate to the site, and you get a little username/password pop-up. Browsers cache the username and password you specify, but when making calls via Java you will need to make sure that you include the appropriate header with every request.

You'll need something like this (from this example):

	// HTTP POST request
	private void sendPost(String url) throws Exception {

		URL obj = new URL(url);
		HttpURLConnection con = (HttpURLConnection) obj.openConnection();
		String encoded = Base64.encode("username:password");
		con.setRequestProperty("Authorization", "Basic "+encoded);

		con.setRequestMethod("POST");
		// con.setRequestProperty("user.login", apiUsername);
		// con.setRequestProperty("user.password", apiPassword);

		...
	}