public static String hmacSha512Hex(final String key, final String valueToDigest) {
        return getHmacHex(HmacAlgorithms.HMAC_SHA_512, key, valueToDigest);
    }
Returns a HmacSha512 Message Authentication Code (MAC) as hex string (lowercase).

@param key           The key
@param valueToDigest The value to use to digest
@return Message Authentication Code
shenyu-common/src/main/java/org/apache/shenyu/common/utils/HmacHexUtils.java