fix send notification to users and create custom user method

public/site/plugins/user-methods/index.php

@@ -0,0 +1,27 @@
+<?php
+
+Kirby::plugin('adrienpayet/pdc-user-methods', [
+  'userMethods' => [
+    'sendNotification' => function ($group, $data) {
+      foreach (kirby()->users()->not($this) as $otherUser) {
+        try {
+          $notifications = $otherUser->notifications()->isNotEmpty() 
+              ? Yaml::decode($otherUser->notifications()->value())
+              : [];          
+
+          if (!isset($notifications[$group])) {
+            $notifications[$group] = [];
+          }
+
+          $notifications[$group][$data['id']] = $data;
+
+          $otherUser->update([
+            'notifications' => $notifications
+          ]);
+        } catch (\Throwable $th) {
+          throw new Exception("Error updating notifications: " . $th->getMessage() . ' line ' . $th->getLine(), 1);
+        }
+      }
+    }
+  ]
+]);