JWT authentication

import io.jsonwebtoken.JwtBuilder;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;
import java.util.Date;
public class JwtAuthorizationGeneratorSample {
    public static void main(String[] args) {
        /*
         * Encryption algorithm
         * Refer to https://jwt.io or https://github.com/jwtk/jjwt for supported algorithms
         */
        String algorithm = "HS256";
        /*
         * The value issued from SHOPLIVE base64 encoded secret key
         */
        String base64EncodedSecretKey = "ckFXaWtRWENtSTA2QnpGVmxWNlBySWF4cUk1Q1pxbHU=";
        /*
         * Set expiring time for JWT token as 12 hours
         */
        long expiration = System.currentTimeMillis() + 12 * (60 * 60 * 1000);
        // OR
        // long expiration = LocalDateTime.now().plus(12, ChronoUnit.HOURS).atZone(ZoneId.systemDefault()).toEpochSecond();
        /*
         * User ID
         * User ID is the value that can identify the viewers uniquely and can be set up to 255 bytes.
         */
        String userId ="sample_user_id";
        /*
         * Nickname 
         * Banned words are replaced with '*'.
         */
        String name = "my_nickname";
        /*
         * Additional information for analyzing users based on the gender in the data insights.
         * male(m), female(f) others(n, null, etc.)
         */
        String gender = "f";
        /*
        /* Age or generation. Additional information for analyzing users based on age/generation in the data insights.
         * You can enter any non-negative number and will be summarized in the data insights grouped by 5 years.
         */
        Integer age = 15;  
        /*
         * Provide the custom data along with the user information when downloading the list of participants from the data insights for storing user information in addition to userId.
         */
        String custom = "{Custom Data}";
        /*
         * Set user score. You can utilize these values when selecting winners for events or quizzes.
         */
        int userScore = 34;
        /*
         * When entering a broadcast with set entry restrictions (Entry Type), you can reference this value to configure access exclusively for specific users (VIP).
         */
        String userType = "VIP";
        /*
         * User profile image URL
         */
        String profile = "https://image.shoplive.cloud/sample_profile.png";

        JwtBuilder builder = Jwts.builder()
            .signWith(SignatureAlgorithm.forName(algorithm), base64EncodedSecretKey)
            .setExpiration(new Date(expiration))
            .setIssuedAt(new Date())
            .claim("userId", userId)
            .claim("name", name)
            .claim("gender", gender)
            .claim("age", age)
            .claim("custom", custom)
            .claim("userScore", userScore)
            .claim("userType", userType)
            .claim("profile", profile);
      
        String jwt = builder.compact();
        System.out.printf("jwt: " + jwt);
    }
}