flutter_tracker/lib/model/login_entity.dart

import 'package:flutter_tracker/model/message_model.dart';

class LoginEntity {
  String token;
  MessageModel msgModel;

  LoginEntity.fromJson(Map<String, dynamic> json) {
    msgModel = MessageModel.fromJson(json);
    if (msgModel.success) {
      token = json["data"]["token"];
    }
  }
}