Logging in to Rollcall using Java in Play Framework

rollcall-play-example.java

// authenticate with rollcall
String rollcallUrl = Play.configuration.getProperty("sail.rollcall.url");
		
WSRequest req = WS.url(rollcallUrl+"/login.json");
req.setParameter("session[login]", username);
req.setParameter("session[password]", password);
WS.HttpResponse res = req.post();
		
JsonElement json = res.getJson();
		
if (res.getStatus() == 201) { // session created successfully
    JsonObject session = json.getAsJsonObject().getAsJsonObject("session");
    JsonObject account = session.getAsJsonObject("account");
			
    String token = session.get("token").getAsString();
    String encryptedPassword = account.get("encrypted_password").getAsString();
			
    // now check if we already have this user in the local database
			
 } else { // some error during session creation
    flash.put("error", "Rollcall authentication failed: "+json.toString());
    return false;
}