Qt C++ QtWebKit Application

Question

I made a web browser using qtwebkit. Site I want to enter without applying "http://atlas". This is subversion repository. I need username and password prompt. But , There is no direct authorization saying no authorization.

void WebBrowser::on_webView_loadStarted()
{
    ui->webView->load(ui->lineEdit->text());
}

FireFox Browser wants this user login as follows,Why is not it the same?