import 'package:json_annotation/json_annotation.dart'; part 'change.g.dart'; @JsonSerializable(explicitToJson: true) class ChangePassword { @JsonKey(name: 'old') final String oldPassword; @JsonKey(name: 'new') final String newPassword; const ChangePassword({required this.oldPassword, required this.newPassword}); factory ChangePassword.fromJson(Map json) => _$ChangePasswordFromJson(json); Map toJson() => _$ChangePasswordToJson(this); }