flutter_green/lib/model/user_model.dart

class UserModel {
  String username = "";
  String password = "";
  String token = "";

  UserModel.fromJson(Map<String, dynamic> json) {
    username = json["username"];
    password = json["password"];
    token = json["token"];
  }

  Map<String, dynamic> toJson() {
    return {
      "username": username,
      "password": password,
      "token": token,
    };
  }
}