import 'package:http/http.dart' as http; import 'dart:convert'; void main() async { String base1 = 'https://codefirst.iut.uca.fr/containers/passworld-api-remiarnal'; String base2 = 'localhost:8080'; Uri baseURL = Uri.parse("$base2/auth"); String body = """ { "mail" : "haha", "password" : "haha" } """; var res = await http.post(baseURL, body: body); print(res.body); }