import 'package:json_annotation/json_annotation.dart'; part 'user_data.g.dart'; @JsonSerializable() class UserModel { String? uid; String? userName; String? nickName; String? tel; String? exp1; String? head; String? tmpHead; String? tmpNickName; UserModel(); static UserModel fromJson(Map json) => _$UserModelFromJson(json); Map toJson() => _$UserModelToJson(this); }