void testHandlePasswordOnly() throws Exception {
        JAASAuthenticator auth = new JAASAuthenticator("DOM", "user", "secret");
        PasswordCallback pc = new PasswordCallback("pass:", false);
        auth.handle(new Callback[] { pc });
        assertEquals("secret", new String(pc.getPassword()));
    }

    @Test
    @DisplayName("handle: empty user/domain edge yields '@' and null password")

	ROTRV	$4, R4			// 84104d00
	SYSCALL				// 00002b00
	BEQ	R4, R5, 1(PC)		// 85040058
	BEQ	R4, 1(PC)		// 80040040
	BEQ	R4, R0, 1(PC)		// 80040040
	BEQ	R0, R4, 1(PC)		// 80040040
	BNE	R4, R5, 1(PC)		// 8504005c
	BNE	R4, 1(PC)		// 80040044
	BNE	R4, R0, 1(PC)		// 80040044
	BNE	R0, R4, 1(PC)		// 80040044
	BLTU	R4, 1(PC)		// 80040068
	MOVF	y+8(FP), F4		// 6440002b
	MOVD	y+8(FP), F4		// 6440802b

        }
        return true;
    }

    private static boolean checkPreauthContext(final Smb2NegotiateRequest req, final PreauthIntegrityNegotiateContext pc) {
        if (pc.getHashAlgos() == null || pc.getHashAlgos().length != 1) {
            log.error("Server returned no hash selection");
            return false;
        }

        PreauthIntegrityNegotiateContext rpc = null;

                    nc.setName(this.getUsername() + "@" + userDomain);
                }
            } else if (cb instanceof PasswordCallback pc) {
                char[] passwordChars = this.getPasswordAsCharArray();
                if (passwordChars != null) {
                    pc.setPassword(passwordChars);
                }
            }
        }
    }

		Creds:     credentials.NewStaticV4(accessKey, secretKey, ""),
		Secure:    epURL.Scheme == "https",
		Transport: globalRemoteTargetTransport,
	})
}

func getS3Client(pc madmin.PeerSite) (*minio.Client, error) {
	ep, err := url.Parse(pc.Endpoint)
	if err != nil {
		return nil, err
	}
	if globalBucketTargetSys.isOffline(ep) {