public IActionResult Edit(SubjectInfoVM vm)
 {
     if (!ModelState.IsValid)
     {
         return(BadRequest(ModelState.GetErrorJson()));
     }
     else
     {
         vm.DoEdit(false);
         if (!ModelState.IsValid)
         {
             return(BadRequest(ModelState.GetErrorJson()));
         }
         else
         {
             return(Ok(vm.Entity));
         }
     }
 }