public async Task <HttpResponseMessage> NotAttendedAppointment(Guid appointmenId)
{
return(await ValidateAndHandleOperationExecutionAsync(async() =>
{
var app = await _calendarDomainService.GetAppointmentsById(appointmenId);
app.IsAttended = false;
var result = await _calendarDomainService.SaveAppointment(app);
return Request.CreateResponse(HttpStatusCode.OK, result);
}));
}