sendShareLocationNotification function
sends a share location notification to the atsign, with a 'ttl' of minutes.
before calling this atsign should be checked if valid or not.
Implementation
Future<bool?> sendShareLocationNotification(String atsign, int? minutes) async {
var result = await SharingLocationService()
.sendShareLocationEvent(atsign, false, minutes: minutes);
return result;
}