public IActionResult SearchDrugsByID(int drugId)
        {
            try
            {
                // validating drugId
                if (drugId > 0)
                {
                    // Checking if drug with specific id is present.
                    Drug drug = _drugService.SearchDrugsByID(drugId);

                    // Drug ID(id) entered For Searching.
                    if (drug == null)
                    {
                        return(NotFound("Drug with specified drugId is not available"));
                    }
                    return(Ok(drug));
                }
                return(BadRequest());
            }

            catch (Exception e)
            {
                return(BadRequest("Error occured from " + nameof(DrugsApiController.SearchDrugsByID) + " Error Message " + e.Message));
            }
        }