create method
Implementation
@override
Future create() async {
Event event = Event(
orgUnit: this.orgUnit as String,
status: 'ACTIVE',
enrollment: this.enrollment ?? '',
dirty: true,
synced: false,
programStage: this.programStage,
eventDate: DateTime.now().toIso8601String());
this.data = event;
await this.save();
return event;
}