How to emulate authorization on someone else's site through VKontakte?

Question

Java

Good afternoon. I ran into a problem when emulating authorization on the site through the VKontakte widget. I use java and htmlUnit. The problem is this. When you enter the site, you click on the button to enter through VK, a pop-up window appears
In the browser, after clicking on the "Allow" button, the window closes and the page (on which the login was performed) is updated. In htmlUnit after clicking on the "Allow" button. the application is installed, but the login on the site does not occur. (After refreshing the page, the user also remains unlogged).

String applicationName = "Mozilla";
String applicationVersion = "5.0";
String userAgent = "Mozilla/5.0 (Windows NT 6.3; WOW64; rv:35.0) Gecko/20100101 Firefox/35.0";
int browserVersionNumeric = 35;
BrowserVersion Mozilla35 = new BrowserVersion(applicationName, applicationVersion, userAgent, browserVersionNumeric);
                    
WebClient likesFm = new WebClient(Mozilla35);
likesFm.addRequestHeader("Accept-Language", "ru");
likesFm.setJavaScriptTimeout(10*1000);
likesFm.getOptions().setCssEnabled(false);
likesFm.getOptions().setRedirectEnabled(true);
likesFm.getOptions().setThrowExceptionOnScriptError(false);
likesFm.getOptions().setGeolocationEnabled(true);
likesFm.getOptions().setUseInsecureSSL(true);
likesFm.setAjaxController(new NicelyResynchronizingAjaxController());
likesFm.getCookieManager().setCookiesEnabled(true);
likesFm.getOptions().setJavaScriptEnabled(true);
likesFm.getOptions().setThrowExceptionOnFailingStatusCode(false);
likesFm.getOptions().setTimeout(60*1000);
likesFm.getOptions().setPopupBlockerEnabled(false);
java.util.logging.Logger.getLogger("com.gargoylesoftware.htmlunit").setLevel(Level.OFF); 
java.util.logging.Logger.getLogger("com.gargoylesoftware").setLevel(Level.OFF); 
System.setProperty("org.apache.commons.logging.Log", "org.apache.commons.logging.impl.NoOpLog");
HtmlPage vkPage = likesFm.getPage(new WebRequest(new URL("https://vk.com/"), HttpMethod.POST));
final HtmlForm vkForm = vkPage.getFormByName("login");
final HtmlSubmitInput vkButton = (HtmlSubmitInput)vkForm.getFirstByXPath("//*[@id=\'quick_login_form\']/input[8]");
final HtmlTextInput vkEmail = vkForm.getInputByName("email");
final HtmlPasswordInput vkPass = vkForm.getInputByName("pass");
vkEmail.setValueAttribute(this.login);
vkPass.setValueAttribute(this.pass);
/* Залогинились ВКонтакте */
final HtmlPage pageLoginVk = vkButton.click();
 /* Логинимся на сайте */
final HtmlPage likes = likesFm.getPage("https://likes.fm/");   
System.out.println(likesFm.getCurrentWindow().getEnclosedPage());
final HtmlButton oauth = likes.getFirstByXPath("/html/body/div[3]/div[1]/div[1]/button");
//ВКонтакте | Разрешение доступа
final HtmlPage oauthres = oauth.click();
System.out.println(likesFm.getCurrentWindow().getEnclosedPage());
final HtmlButton oauth2;
final HtmlPage oauthres2;
if(oauthres.getTitleText().contains("ВКонтакте")) {  
        oauth2 = oauthres.getFirstByXPath("//*[@id=\"install_allow\"]");
        oauthres2 = oauth2.click();
} else {
        String parameterss = likesFm.getCookieManager().getCookies().toString();
        System.out.println(parameterss);
        likesFm.waitForBackgroundJavaScript(1000);
        likesFm.waitForBackgroundJavaScriptStartingBefore(1000);
}
System.out.println(oauthres.getBody().asText());
final HtmlPage likes1 = likesFm.getPage("https://likes.fm/");
System.out.println(likes1.getBody().asText());

Maybe someone did something similar? Tell..

Answer 1

because the whole /public_html/bitrix/* folder is ignored

Answer 2

https://git-scm.com/docs/gitignore
For quick generation:
https://www.gitignore.io/