How to hide a class in a POST request?

I am trying to capture the Spring annotation(@NotBlank, @Pattern, etc) errors in Errors class and throwing error if it is not empty.

@PostMapping("/nodes")
public ResponseEntity<List<SagaInfo>> createNode(@Valid NodePostRequest nodePostRequest, Errors errors) {
    if (errors.hasErrors()) {

      //collect errors in collection

      //throw custom exception

   }

}

This Errors.class fields are showing on swagger and I don't want that to happen. I don't know any annotation that works. I have also tried to add handleMethodArgumentNotValid in a custom class with @ControllerAdvice to handle the errors, but somehow the errors are not caught there.

Any thoughts?