*
     * @param request the HTTP servlet request
     * @return the authorization URL
     */
    protected String getAuthUrl(final HttpServletRequest request) {
        final String state = UuidUtil.create();
        request.getSession().setAttribute(OIC_STATE, state);
        return new AuthorizationCodeRequestUrl(getOicAuthServerUrl(), getOicClientId())//
                .setScopes(Arrays.asList(getOicScope()))//

                final String loginUrl = auth.login(null, authnRequestParams, true);
                request.getSession().setAttribute(SAML_STATE, UuidUtil.create());
                return new ActionResponseCredential(() -> HtmlResponse.fromRedirectPathAsIs(loginUrl));
            } catch (final Exception e) {
                throw new SsoLoginException("Invalid SAML redirect URL.", e);

            file.setReadable(true, true);
            file.setWritable(false, false);
            file.setWritable(true, true);
            if (logger.isDebugEnabled()) {
                logger.debug("Create {} as a temp file.", file.getAbsolutePath());
            }
            return file;
        } catch (final IOException e) {
            throw new IORuntimeException(e);
        }
    }

    /**