connect with backend

lib/services/mark_list_service.dart

@@ -0,0 +1,29 @@
+import 'package:dio/dio.dart';
+import 'package:flutter/material.dart';
+import 'dio_client.dart';
+
+class MarkListService {
+  late Dio _dio;
+
+  MarkListService(BuildContext context) {
+    _dio = DioClient.getInstance(context);
+  }
+
+  Future<Map<String, dynamic>> addMark(Map<String, dynamic> data) async {
+    try {
+      final res = await _dio.post('/add-mark-no', data: data);
+      return Map<String, dynamic>.from(res.data);
+    } catch (e) {
+      return {'success': false, 'message': e.toString()};
+    }
+  }
+
+  Future<Map<String, dynamic>> getMarks() async {
+    try {
+      final res = await _dio.get('/show-mark-list');
+      return Map<String, dynamic>.from(res.data);
+    } catch (e) {
+      return {'success': false, 'message': e.toString()};
+    }
+  }
+}