Web API Call in Flutter

import 'dart:async';
import 'dart:convert';
import 'dart:io';

class MainController{

//API Access URL
final String url = 'https://xxxxx.com/';

Future CallAPI(String Controler,Map map) async {

HttpClient client = new HttpClient();
client.badCertificateCallback = ((X509Certificate cert, String host, int port) => true);
HttpClientRequest request = await client.postUrl(Uri.parse(url+Controler));
request.headers.set('content-type', 'application/json');
request.add(utf8.encode(json.encode(map)));
HttpClientResponse response = await request.close();
String reply = await response.transform(utf8.decoder).join();
print(reply);
return reply;

}
Future LoginCValidate(String Email,String Password) async {
//Post Request Body
Map map = {
"Email" : Email ,
"Password" : Password
};

//Call API 
//YourControllerName = Rest of the your Request URL
Future Result = CallAPI('YourControllerName',map);
print(Result);
}
}