asp.net post reponse location CreatedAtRoute

[HttpPost]
        [ProducesResponseType(StatusCodes.Status201Created)]
        [ProducesResponseType(StatusCodes.Status400BadRequest)]
        [ProducesResponseType(StatusCodes.Status500InternalServerError)]
        public ActionResult<VillaDTO> CreateVilla([FromBody] VillaCreateDTO villaDTO)
        {
 
            if (_db.Villas.FirstOrDefault(u => u.Name.ToLower() == villaDTO.Name.ToLower()) != null)
            {
                ModelState.AddModelError("CustomError", "Villa already Exists!");
                return BadRequest(ModelState);
            }
 
            if (villaDTO == null)
            {
                return BadRequest(villaDTO);
            }
 
 
            Villa model = new()
            {
                Amenity = villaDTO.Amenity,
                Details = villaDTO.Details,
                ImageUrl = villaDTO.ImageUrl,
                Name = villaDTO.Name,
                Occupancy = villaDTO.Occupancy,
                Rate = villaDTO.Rate,
                Sqft = villaDTO.Sqft
            };
 
            _db.Villas.Add(model);
            _db.SaveChanges();
 
            // 会在response的head中增加一个location地址,指向新添加的地址
            return CreatedAtRoute("GetVilla", new { id = model.Id }, model);
            // return Ok(villaDTO);
        }