Dart is Expired

dart is expired date.dart

/**
   import 'package:intl/intl.dart';
   
   * MAKE A FUNCTION TO CHECK EXPIRE
   * */
  bool isExpired(date) {
    DateTime parseDate = DateFormat("yyyy-MM-dd").parse(date);
    var inputDate = DateTime.parse(parseDate.toString());
    var todayDate = DateTime.now();
    final difference = inputDate.difference(todayDate).inDays;
    return difference < 0;
  }

  isSubscriptionValidToday() {
    if (this._membershipEndDate != null) {
      return !this.isExpired(this._membershipEndDate);
    }

    return false;
  }