validate token example

tokenValidation.java

public Boolean validateToken(final String token) {
         try {
             if (!StringUtils.isEmpty(token)) {
                 Algorithm algorithm = Algorithm.HMAC256(JWT_TOKEN_KEY);
                 JWTVerifier verifier = JWT.require(algorithm)
                         .withIssuer("admin")
                         .build();
                 DecodedJWT jwt = verifier.verify(token);
                 return jwt.getClaim("userId") != null;
             } else {
                 return false;
             }
         } catch (JWTVerificationException e) {
             LOGGER.error("PROBLEM", e);
             throw new RuntimeException("Something bad happened. Please try again later");
         }
     }