[Web] keycloak auth functions

data/web/index.php

@@ -29,6 +29,8 @@ $template_data = [
   'oauth2_request' => @$_SESSION['oauth2_request'],
   'is_mobileconfig' => str_contains($_SESSION['index_query_string'], 'mobileconfig'),
   'login_delay' => @$_SESSION['ldelay'],
+  'has_keycloak_sso' => ($keycloak_provider) ? true : false,
+  'invalid_keycloak_sso' => $_SESSION['invalid_keycloak_sso']
 ];
 
 $js_minifier->add('/web/js/site/index.js');