fix some things that are wrong in the data structures

app.py

@@ -434,8 +434,8 @@ class WebPushService():
         # Retrieving the subscription information from the incoming request
         content = request.json
         endpoint = content['endpoint']
-        p256dh = content['p256dh']
+        p256dh = content['keys']['p256dh']
-        auth = content['auth']
+        auth = content['keys']['auth']
 
         # Looking up the subscription in the database
         subscription = Subscription.query.filter_by(endpoint=endpoint, p256dh=p256dh, auth=auth).first()
@@ -449,10 +449,11 @@ class WebPushService():
                     "auth": subscription.auth
                 }
             }
-            vapid_key = VAPIDKey.query.first()
+            vapid_key = VAPIDKey.query.filter_by(id = subscription.vapid_key_id)
-            result = WebPushService._send_push_notification(subscription_info, {"title": "Test Notification", "message": "This is a test notification"}, vapid_key)
+            result = WebPushService._send_push_notification(subscription_info, {"title": "Test Notification", "message": "This is a test notification"}, vapid_key.private_key)
             return jsonify(result)
         else:
             return jsonify({"success": False, "message": "Subscription not found"}), 404
 
+
 web_push_service = WebPushService(app, "app")