private async Task MakeBookingAsync()
        {
            if (IsBusy)
            {
                return;
            }

            IsBusy = true;
            try
            {
                var dbuser = _realm.All <Patient>().FirstOrDefault();
                if (CrossConnectivity.Current.IsConnected)
                {
                    var isSuccess = await services.CreateAppointment(dbuser.id, FullDateAndMonth, SelectedDoctor, SelectedMedicalBuilding);
                }
                else
                {
                    BookingSuccess = false;
                }
            }
            catch (Exception ex)
            {
                System.Diagnostics.Debug.WriteLine(ex);
            }
            finally
            {
                BookingSuccess = true;
                IsBusy         = false;
            }
        }