adds attendee (#3808)

packages/lib/CalendarService.ts

@@ -88,13 +88,17 @@ export default abstract class BaseCalendarService implements Calendar {
         description: getRichDescription(event),
         location: getLocation(event),
         organizer: { email: event.organizer.email, name: event.organizer.name },
+        attendees: getAttendees(event.attendees),
         /** according to https://datatracker.ietf.org/doc/html/rfc2446#section-3.2.1, in a published iCalendar component.
          * "Attendees" MUST NOT be present
          * `attendees: this.getAttendees(event.attendees),`
+         * [UPDATE]: Since we're not using the PUBLISH method to publish the iCalendar event and creating the event directly on iCal,
+         * this shouldn't be an issue and we should be able to add attendees to the event right here.
          */
       });
 
-      if (error || !iCalString) throw new Error("Error creating iCalString");
+      if (error || !iCalString)
+        throw new Error(`Error creating iCalString:=> ${error?.message} : ${error?.name} `);
 
       // We create the event directly on iCal
       const responses = await Promise.all(