* @param sae the authentication exception that was thrown
     * @return credentials returned by prompt or null if none available
     */

    public static NtlmPasswordAuthentication requestNtlmPasswordAuthentication(final String url, final SmbAuthException sae) {
        if (auth == null) {
            return null;
        }
        synchronized (auth) {
            auth.url = url;
            auth.sae = sae;

        }
        final NtlmAuthenticator auth = NtlmAuthenticator.getDefault();
        if (auth != null) {
            final NtlmPasswordAuthenticator newAuth =
                    NtlmAuthenticator.requestNtlmPasswordAuthentication(auth, locationHint, error instanceof SmbAuthException s ? s : null);
            if (newAuth != null) {
                this.creds = newAuth;
                return true;
            }
        }