add get business user and chanegh api to service name

Frontend/lib/mih_services/mih_my_business_user_services.dart

@@ -1,12 +1,28 @@
 import 'dart:convert';
-
+import 'package:mzansi_innovation_hub/mih_components/mih_objects/business_user.dart';
 import 'package:mzansi_innovation_hub/mih_components/mih_pop_up_messages/mih_loading_circle.dart';
 import 'package:flutter/material.dart';
 import 'package:mzansi_innovation_hub/mih_config/mih_env.dart';
 import '../mih_components/mih_pop_up_messages/mih_error_message.dart';
 import 'package:supertokens_flutter/http.dart' as http;
 
-class MihMyBusinessUserApi {
+class MihMyBusinessUserServices {
+  Future<BusinessUser?> getBusinessUser(
+    String app_id,
+  ) async {
+    var response = await http.get(
+      Uri.parse("${AppEnviroment.baseApiUrl}/business-user/$app_id"),
+      headers: <String, String>{
+        "Content-Type": "application/json; charset=UTF-8"
+      },
+    );
+    if (response.statusCode == 200) {
+      return BusinessUser.fromJson(jsonDecode(response.body));
+    } else {
+      return null;
+    }
+  }
+
   Future<int> createBusinessUser(
     String business_id,
     String app_id,