public IActionResult Post(int vehicleId, [FromBody] ModificationViewModel model)
 {
     try
     {
         if (ModelState.IsValid)
         {
             var newMod  = _mapper.Map <ModificationViewModel, Modification>(model);
             var vehicle = _repository.GetVehicleById(vehicleId);
             _repository.AddModification(newMod);
             vehicle.Modifications.Add(newMod);
             _context.SaveChanges();
             return(Ok(_mapper.Map <Modification, ModificationViewModel>(newMod)));
         }
         else
         {
             return(BadRequest(ModelState));
         }
     }
     catch (Exception e)
     {
         return(BadRequest($"Unable to post a new modification {model} to vehicle: {vehicleId}."));
     }
 }