create loyalty card mih object

Frontend/lib/mih_objects/loyalty_card.dart

@@ -0,0 +1,31 @@
+class MIHNotification {
+  final int idloyalty_cards;
+  final String app_id;
+  final String shop_name;
+  final String card_number;
+
+  const MIHNotification({
+    required this.idloyalty_cards,
+    required this.app_id,
+    required this.shop_name,
+    required this.card_number,
+  });
+
+  factory MIHNotification.fromJson(Map<String, dynamic> json) {
+    return switch (json) {
+      {
+        "idloyalty_cards": int idloyalty_cards,
+        "app_id": String app_id,
+        "shop_name": String shop_name,
+        "notification_read": String card_number,
+      } =>
+        MIHNotification(
+          idloyalty_cards: idloyalty_cards,
+          app_id: app_id,
+          shop_name: shop_name,
+          card_number: card_number,
+        ),
+      _ => throw const FormatException('Failed to load loyalty card.'),
+    };
+  }
+}