add lastmodified and lastmodifiedid to table also add code for modified and create

CarParkValidationAPI/Interface/IConcessionValidation.cs

@@ -17,5 +17,6 @@ namespace CarParkValidationAPI.Interface
         Task<ResultModel<ConcessionValidationDto>> LoadConcessionValidationByIdAsync(int id);
         Task<ResultModel<bool>> DeleteConcessionValidationAsync(int id);
         Task<ResultModel<FileContent>> GetReport(DateTime fromDate, DateTime toDate);
+        void SetCurrentUser(string username);
     }
 }