connect with backend

lib/services/dio_client.dart

@@ -0,0 +1,33 @@
+import 'package:dio/dio.dart';
+import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
+import '../config/api_config.dart';
+import '../providers/auth_provider.dart';
+import 'token_interceptor.dart';
+
+class DioClient {
+  static Dio? _dio; // Singleton instance
+
+  static Dio getInstance(BuildContext context) {
+    if (_dio == null) {
+      _dio = Dio(
+        BaseOptions(
+          baseUrl: ApiConfig.baseUrl,
+          connectTimeout: const Duration(seconds: 15),
+          receiveTimeout: const Duration(seconds: 15),
+          headers: {
+            "Accept": "application/json",
+          },
+        ),
+      );
+
+      final authProvider = Provider.of<AuthProvider>(context, listen: false);
+
+      _dio!.interceptors.add(
+        TokenInterceptor(authProvider, context, _dio!),
+      );
+    }
+
+    return _dio!;
+  }
+}