public async Task <IActionResult> SaveCovid(CovidClass covidClass)
        {
            await _covidService.SaveCovid(covidClass);

            IQueryable <CovidClass> covid = _covidService.GetList();

            return(Ok(covid));
        }
        public async Task <IActionResult> SaveCovid(Covid covid)
        {
            await _service.SaveCovid(covid);

            IQueryable <Covid> covids = _service.GetList();

            return(Ok(_service.GetCovidChartList()));
        }