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

CarParkValidationAPI/Controllers/ConcessionTypeController.cs

@@ -22,6 +22,10 @@ namespace CarParkValidationAPI.Controllers
         [HttpPost]
         public async Task<IActionResult> ConcessionType([FromBody] ConcessionTypeDto model)
         {
+            var currentUser = (User)HttpContext.Items["User"];
+            if (null == currentUser)
+                return Unauthorized(new { message = "Unauthorized" });
+            _concessionType.SetCurrentUser(currentUser.Username);
             var response = await _concessionType.SaveConcessionTypeAsync(model);
             return Ok(response);
         }