final HtmlForm form = authorizationPage.getForms().get(0);
final HtmlTextInput email = form.getInputByName("email");
email.setValueAttribute("testscribeup@gmail.com");
final HtmlPasswordInput password = form.getInputByName("password");
password.setValueAttribute("a1z2e3r4!$");
final HtmlSubmitInput submit = form.getInputByName("_eventId_submit");
final HtmlPage confirmPage = submit.click();
final HtmlAnchor anchor = (HtmlAnchor) confirmPage.getElementById("continueButtonLink");
final HtmlPage confirmPage2 = anchor.click();
final String content = confirmPage2.asXml();
final String url = StringUtils.substringBetween(content, "redirectUrl = \"", "\";");
final HtmlPage callbackPage = webClient.getPage(url);