diff --git a/testserver/docker_wordpress/Documentation.md b/testserver/docker_wordpress/Documentation.md
index b636e64c97497e18676ee978b35211e9a84d000a..aec4e8677134f074712c1b42ba613e474842581f 100644
--- a/testserver/docker_wordpress/Documentation.md
+++ b/testserver/docker_wordpress/Documentation.md
@@ -68,27 +68,31 @@ Benutzer, mit der Gruppe 'wordpress_admin' in uddf erhalten Administrator-Berech
 Alle anderen Benutzer erhalten Editor-Berechtigungen. 
 
 ```
-add_action('openid-connect-generic-update-user-using-current-claim', function( $user, $user_claim) {
-	
-    // Based on some data in the user_claim, modify the user.
-	foreach($user_claim as $key => $value) {
-		error_log('Openid Role mapping: User claim: ' . $key . ', Value: ' . $value);
-	}
-	
-	if ( array_key_exists( 'groups', $user_claim ) ) {
-		
-		error_log('Openid Role mapping: Groups: ' . implode(',',$user_claim['groups']));
-
-		if ( in_array('wordpress_admin', $user_claim['groups'] )) {
-			
-			error_log('Openid Role mapping: Set role: Administrator');
-        	$user->set_role( 'administrator' );
-		}
-		else {
-			
-			error_log('Openid Role mapping: Set role: Editor');
-			$user->set_role( 'editor' );
-		}
+add_action('openid-connect-generic-update-user-using-current-claim', function($user, $user_claim) {
+    
+    // Log all user claims safely
+    foreach($user_claim as $key => $value) {
+        $valueToLog = is_array($value) ? json_encode($value) : $value;
+        error_log('Openid Role mapping: User claim: ' . $key . ', Value: ' . $valueToLog);
+    }
+    
+    if (array_key_exists('groups', $user_claim)) {
+        // Ensure groups is an array before working with it
+        if (is_array($user_claim['groups'])) {
+            error_log('Openid Role mapping: Groups: ' . implode(',', $user_claim['groups']));
+            
+            if (in_array('wordpress_admin', $user_claim['groups'])) {
+                error_log('Openid Role mapping: Set role: Administrator');
+                $user->set_role('administrator');
+            } else {
+                error_log('Openid Role mapping: Set role: Editor');
+                $user->set_role('editor');
+            }
+        } else {
+            // If groups is not an array, log its actual format
+            error_log('Openid Role mapping: Groups is not an array: ' . gettype($user_claim['groups']));
+            error_log('Openid Role mapping: Groups value: ' . json_encode($user_claim['groups']));
+        }
     }
 }, 10, 2);
 ```