Fix graphql api (#1165)

Author: ashhhleyyy

composer.json

@@ -7,7 +7,7 @@
         "soundasleep/html2text": "~0.5",
         "twig/twig": "~2.4",
         "ext-xmlwriter": "*",
-        "webonyx/graphql-php": "^0.13.8",
+        "webonyx/graphql-php": "^15.0.0",
         "ext-json": "*",
         "spatie/icalendar-generator": "^2.1",
         "simshaun/recurr": "^4.0",

src/Classes/MyRadio/GraphQLUtils.php

@@ -160,7 +160,7 @@ private static function processAuthDirective(
         $resolvedObject = null
     ) {
         if (isset($args['constants'])) {
-            $constants = $args['constants'];
+            $constants = $args['constants']->values;
             // No constants => public access
             if (count($constants) === 0) {
                 return true;