public static String hmacMd5Hex(final String key, final String valueToDigest) {
        return getHmacHex(HmacAlgorithms.HMAC_MD5, key, valueToDigest);
    }
@Test
    public void testHmacMd5Hex() {
        assertEquals(HmacHexUtils.hmacMd5Hex("testKey", "testValue"), "3024ffb5567372102ca6775cf8140cb1");
    }