Log in after redirect twitch/tv

API
6

i try like this

package jsoup;

import java.awt.Desktop;
import java.net.URI;

import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.chrome.ChromeDriver;

public class login_test {
public static void main(String args[]) throws Exception {

	// Create Desktop object
	Desktop d = Desktop.getDesktop();

	// Browse a URL, say google.com
	d.browse(new URI("https://google.com/"));
	d.browse(new URI("http://twitch.tv/"));
			
	Document doc = Jsoup.connect(URL).get() <--it's not work
	System.out.println(doc);
}

}

l don’t know exactly but it automatically signed in the page(http://twitch.tv/)
In this moment, i have another question
after signed in the page how to i get the page source??
i want it to get some page source(like HTML code for page)<=