class PremiumResult { final String accessToken; final List scopes; final String login; PremiumResult({ required this.accessToken, required this.scopes, required this.login, }); factory PremiumResult.fromJson(Map json) { return PremiumResult( accessToken: json["access_token"] ?? "", scopes: (json["scopes"] ?? []).cast(), login: json["login"] ?? "", ); } }