updated note model

@JsonSerializable(explicitToJson: true, includeIfNull: false)

final class Note implements Identifiable {

  static const MESSAGE_KEY = 'firstName';

  static const CREATED_AT_KEY = 'lastName';

  static const TITLE_KEY = 'title';

  static const MESSAGE_KEY = 'message';

  static const CREATED_AT_KEY = 'createdAt';

  static const AUTHOR_KEY = 'username';

  @override

  final String id;

  @JsonKey(name: TITLE_KEY)

  final String title;

  @JsonKey(name: MESSAGE_KEY)

  final String message;

  @JsonKey(name: CREATED_AT_KEY)

  final DateTime createdAt;

  const Note({

    required this.id,

    required this.title,

    required this.message,

    required this.createdAt,

  });

Note _$NoteFromJson(Map<String, dynamic> json) => Note(

      id: json['id'] as String,

      message: json['firstName'] as String,

      createdAt: DateTime.parse(json['lastName'] as String),

      title: json['title'] as String,

      message: json['message'] as String,

      createdAt: DateTime.parse(json['createdAt'] as String),

    );

Map<String, dynamic> _$NoteToJson(Note instance) => <String, dynamic>{

      'id': instance.id,

      'firstName': instance.message,

      'lastName': instance.createdAt.toIso8601String(),

      'title': instance.title,

      'message': instance.message,

      'createdAt': instance.createdAt.toIso8601String(),

    };