private async Task InviteToGroup(PersonModel person) { person.IsBusy = true; var res = await ApiClient.AddPersonToGroup(person.UserId, Group.Id); if (res.IsOk) { Acr.UserDialogs.UserDialogs.Instance.Toast("Invited"); } else { Acr.UserDialogs.UserDialogs.Instance.Toast("Problem"); } person.IsBusy = false; }