temp token

public static String createEmailVerificationToken(String emailOrUsername) {
        Date validity = new Date(Instant.now().toEpochMilli() + Duration.ofHours(24).toMillis());
        return Jwts.builder()
                .setSubject(emailOrUsername)
                .setExpiration(validity)
                .signWith(Keys.hmacShaKeyFor(SECRET_KEY.getBytes()), SignatureAlgorithm.HS256)
                .compact();
    }

    public static String extractSubject(String verificationToken) {
        return Jwts.parser()
                .setSigningKey(SECRET_KEY.getBytes())
                .parseClaimsJwt(verificationToken)
            .getBody()
            .getSubject();
    }

    public static void main(String[] args) {
        String token = createEmailVerificationToken("martin");
        System.out.println(token);

        String user = extractSubject(token);
        System.out.println(user);
    }