Return NotFound with details

[HttpGet("{id:guid}", Name = "GetUrlaubsantragById")]
[ProducesResponseType(typeof(UrlaubsantragDto), StatusCodes.Status200OK)]
[ProducesResponseType(StatusCodes.Status404NotFound)]
[ProducesResponseType(StatusCodes.Status403Forbidden)]
[ProducesResponseType(StatusCodes.Status401Unauthorized)]
[ProducesResponseType(StatusCodes.Status500InternalServerError)]
public async Task<IActionResult> GetUrlaubsantragById([FromRoute] Guid id)
{
  var result = await _urlaubsantragService.GetUrlaubsantragAsync(id);
  if (result == null)
  {
    return NotFound();
  } 
  
  return Ok(result);
}

{
  "type": "https://tools.ietf.org/html/rfc7231#section-6.5.4",
  "title": "Not Found",
  "status": 404,
  "traceId": "00-cb37e3ba34b597ba19e7cf39665feb58-73e25a81a8b6a327-00"
}

public async Task<IActionResult> GetUrlaubsantragById([FromRoute] Guid id)
{
  var result = await _urlaubsantragService.GetUrlaubsantragAsync(id);
  if (result == null)
  {
    return NotFound("My custom error message");
  } 
    
  return Ok(result);
}