public static String hmacSha256Hex(final String key, final String valueToDigest) {
        return getHmacHex(HmacAlgorithms.HMAC_SHA_256, key, valueToDigest);

    }
@Test
    public void testHmacSha256Hex() {
        assertEquals(HmacHexUtils.hmacSha256Hex("testKey", "testValue"),
            "c52d1ebe5e779f5b337dc8f515bf594bd44a7007cb3f4ab1f6c5a15149bed793");
    }