JWT creation and verification

gistfile1.java

 /**
     * Sample method to obtain data from the JWT response sent by the IDSite and create a new custom JWT 
     */
    private String createJWT(HttpServletRequest request, String issuer, long ttl) {

        IdSiteCallbackHandler idSiteCallbackHandler = application.newIdSiteCallbackHandler(request);
        AccountResult accountResult = idSiteCallbackHandler.getAccountResult();

        long nowMillis = System.currentTimeMillis();
        Date now = new Date(nowMillis);

        SignatureAlgorithm alg = SignatureAlgorithm.HS256;
        String id = UUID.randomUUID().toString();
        String sub = accountResult.getAccount().getHref();
        byte[] apiKeySecretBytes = DatatypeConverter.parseBase64Binary(apiKey.getSecret());
        Key signingKey = new SecretKeySpec(apiKeySecretBytes, alg.getJcaName());

        JwtBuilder builder = Jwts.builder().setId(id)
                                                              .setIssuedAt(now)
                                                              .setSubject(sub)
                                                              .setIssuer(issuer)
                                                              .signWith(alg, signingKey);

        if (ttl >= 0) {
            long ttlMillis = ttl * 1000;
            long expMillis = nowMillis + ttlMillis;
            Date exp = new Date(expMillis);
            builder.setExpiration(exp);
        }

        return builder.compact();
    }

    /**
     * Sample method to validate and read data from the JWT 
     */
    private void parseJWT(String jwt) {
        //This line will throw an exception if it is not a signed JWS (as expected)
        Claims claims = Jwts.parser().setSigningKey(DatatypeConverter.parseBase64Binary(apiKey.getSecret())).parseClaimsJws(jwt).getBody();
        System.out.println("ID: " + claims.getId());
        System.out.println("Subject: " + claims.getSubject());
        System.out.println("Issuer: " + claims.getIssuer());
        System.out.println("Expiration: " + claims.getExpiration());
    }

apiKey.getSecret() in byte[] apiKeySecretBytes = DatatypeConverter.parseBase64Binary(apiKey.getSecret()); i don't see "api" variable, can you support me for this error?