public static URI getUnauthorizedRedirectUrlFromFlowScope(final RequestContext context) {
        return context.getFlowScope().get(PARAMETER_UNAUTHORIZED_REDIRECT_URL, URI.class);
    }
Gets unauthorized redirect url into flow scope.

@param context the context
@return the unauthorized redirect url into flow scope
core/cas-server-core-web-api/src/main/java/org/apereo/cas/web/support/WebUtils.java