add link and ticket backend side

covas_mobile/lib/classes/events.dart

@@ -5,6 +5,8 @@ class Events {
   String? startDate;
   String? endDate;
   String? description;
+  String? link;
+  String? ticket;
   double? latitude;
   double? longitude;
   List<String>? tags;
@@ -21,6 +23,8 @@ class Events {
       this.latitude,
       this.longitude,
       this.organizers,
+      this.link,
+      this.ticket,
       this.imgUrl});
 
   Events.fromJson(Map<String, dynamic> json) {
@@ -38,5 +42,7 @@ class Events {
     organizers = (json['organizers'] as List<dynamic>?)
         ?.cast<String>(); // Convert List<dynamic> to List<String>
     imgUrl = json['imgUrl'] as String?;
+    link = json['link'] as String?;
+    ticket = json['ticket'] as String?;
   }
 }