login jsoup

package controllers;
import java.io.IOException;
import java.util.HashMap;

import org.jsoup.Connection;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;
 
public class JsoupLoginExample {
 
    public static void main(String[] args) {
        
			try {
				// # Constants used in this example
				final String USER_AGENT = "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.103 Safari/537.36"; 
				final String LOGIN_FORM_URL = "https://github.com/login";  
				final String LOGIN_ACTION_URL = "https://github.com/session";  
				final String USERNAME = "yourUsername";  
				final String PASSWORD = "yourPassword";  

				// # Go to login page and grab cookies sent by server
				Connection.Response loginForm = Jsoup.connect(LOGIN_FORM_URL)
				                                     .method(Connection.Method.GET)
				                                     .userAgent(USER_AGENT)
				                                     .execute();  
				Document loginDoc = loginForm.parse(); // this is the document containing response html
				HashMap<String, String> cookies = new HashMap<>(loginForm.cookies()); // save the cookies to be passed on to next request  

				// # Prepare login credentials 
				String authToken = loginDoc.select("#login > form > div:nth-child(1) > input[type=\"hidden\"]:nth-child(2)")  
				                           .first()  
				                           .attr("value");  

				HashMap<String, String> formData = new HashMap<>();
				formData.put("commit", "Sign in");  
				formData.put("utf8", "e2 9c 93");  
				formData.put("login", USERNAME);  
				formData.put("password", PASSWORD);  
				formData.put("authenticity_token", authToken);  

				// # Now send the form for login
				Connection.Response homePage = Jsoup.connect(LOGIN_ACTION_URL)  
				     .cookies(cookies)  
				     .data(formData)  
				     .method(Connection.Method.POST)  
				     .userAgent(USER_AGENT)  
				     .execute();

				System.out.println(homePage.parse().html());  
        
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
    }
}