Cannot call compiled to JS async Dart function from browser console

The dart code I compile is:

import 'dart:js';
import 'package:dio/dio.dart';

final Dio _dio = Dio();

class LoginResponse extends GenericResponse {
  String? accessToken;
  String? refreshToken;

  LoginResponse(statusCode, this.accessToken, this.refreshToken)
      : super(statusCode);
}


Future<LoginResponse> login(String phoneNumber, String password, String otp) async {
    Response response = await _dio.post(
      "https://example.com/token/obtain/",
      data: {'phone_number': phoneNumber, 'password': password, 'otp': otp},
      options: Options(validateStatus: (status) => status! < 500),
    );
    return LoginResponse(response.statusCode, response.data['access'], response.data['refresh']);
  }

main() => context['loginFromDart'] = login;

I wish to access LoginResponse.accessToken and LoginResponse.refreshToken from the browser console. But still didn't find a way to do it.

from Cannot call compiled to JS async Dart function from browser console