/**
     * Displays the login page.
     *
     * @return the HTML response for the login page
     */
    @Execute
    public HtmlResponse index() {
        getSession().ifPresent(session -> session.removeAttribute(INVALID_OLD_PASSWORD));
        return asIndexPage(null).useForm(LoginForm.class);
    }

    private HtmlResponse asIndexPage(final LoginForm form) {
        if (form != null) {
            form.clearSecurityInfo();

                if (ntlm == null) {
                    return null;
                }
                /* negotiation complete, remove the challenge object */
                ssn.removeAttribute("NtlmHttpChal");
            } else {
                final String auth = new String(Base64.decode(msg.substring(6)), "US-ASCII");
                int index = auth.indexOf(':');

                if (ntlm == null) {
                    return null;
                }
                /* negotiation complete, remove the challenge object */
                ssn.removeAttribute("NtlmHttpChal");
            } else {
                final String auth = new String(Base64.decode(msg.substring(6)), "US-ASCII");
                int index = auth.indexOf(':');

            return null;
        }

        @Override
        public void setAttribute(String name, Object o) {
        }

        @Override
        public void removeAttribute(String name) {
        }

        @Override
        public Locale getLocale() {
            return null;
        }

        @Override
        public Enumeration<Locale> getLocales() {

                await this._wait(delay);
            }

            else {
                this.container.appendChild(line);
                await this._wait(delay);
            }

            line.removeAttribute(`${this.pfx}-cursor`);
        }
        this.addRestart()
        this.finishElement.style.visibility = 'hidden'
        this.lineDelay = this.originalLineDelay
        this.typeDelay = this.originalTypeDelay

            if (session != null) {
                final String sesState = (String) session.getAttribute(OIC_STATE);
                if (StringUtil.isNotBlank(sesState)) {
                    session.removeAttribute(OIC_STATE);
                    final String code = request.getParameter("code");
                    final String reqState = request.getParameter("state");
                    if (logger.isDebugEnabled()) {

            return "localhost";
        }

        @Override
        public void setAttribute(String name, Object o) {
        }

        @Override
        public void removeAttribute(String name) {
        }

        @Override
        public java.util.Locale getLocale() {
            return java.util.Locale.getDefault();
        }

        @Override

            if (session != null) {
                final String sesState = (String) session.getAttribute(SAML_STATE);
                if (StringUtil.isNotBlank(sesState)) {
                    session.removeAttribute(SAML_STATE);
                    try {
                        final Auth auth = new Auth(getSettings(), request, response);
                        auth.processResponse();

            return "localhost";
        }

        @Override
        public void setAttribute(String name, Object o) {
        }

        @Override
        public void removeAttribute(String name) {
        }

        @Override
        public java.util.Locale getLocale() {
            return java.util.Locale.getDefault();
        }

        @Override

            return false;
        }

        @Override
        public void setAttribute(String name, Object object) {
        }

        @Override
        public void removeAttribute(String name) {
        }

        @Override
        public String getServletContextName() {
            return null;
        }

        @Override