delete method
delete
Implementation
@override
Future<bool> delete(String key,
{String? sharedWith, bool isPublic = false}) async {
var builder = DeleteVerbBuilder()
..isPublic = isPublic
..sharedWith = sharedWith
..atKey = key
..sharedBy = _currentAtSign;
var deleteResult = await executeVerb(builder);
return deleteResult != null; //replace with call back
}