class PremiumResult { final String sessionId; final List<String> scopes; final String login; PremiumResult({ required this.sessionId, required this.scopes, required this.login, }); factory PremiumResult.fromJson(Map json) { return PremiumResult( sessionId: json["session_id"] ?? "", scopes: (json["scopes"] ?? []).cast<String>(), login: json["customer_id"] ?? "", ); } }