Throw Error on failing file_get_contents($plugin->getConf('openidurl'…

…)); (#6)

It took me quite a while to debug. Finally it was a proxy issue.

But please to not silence errors and continue execution. Throw the errors. Thank you.

Keycloak.php

@@ -41,7 +41,7 @@ public function getEndpoint(string $endpoint)
         if (!isset($this->discovery)) {
             $plugin = plugin_load('helper', 'oauthkeycloak');
             $json = file_get_contents($plugin->getConf('openidurl'));
-            if (!$json) return '';
+            if (!$json) throw new \Exception('Failed accessing ' . $plugin->getConf('openidurl'));
             $this->discovery = json_decode($json, true);
         }
         if (!isset($this->discovery[$endpoint])) return '';