private async Task AddChildrenInList(IEnumerable <string> names, string lastName, string adultId) { foreach (var name in names) { if (!await _manager.ChildExists(name, lastName, adultId)) { _children.Add(await _manager.AddChildForUser(name, lastName, adultId)); } else { _children.Add(await _manager.GetChild(name, lastName, adultId)); } } }