Add dynamic JWT Token expiry time

[DoPaNik]

Currently, the expiration time for JWT tokens is hardcoded to 7 days in the code. To enhance security measures, it is recommended to allow specifying the expiration time in minutes or hours dynamically.

public String createToken(final Principal principal, final List<Permission> permissions, final IdentityProvider identityProvider) {
    final Date today = new Date();
    final JwtBuilder jwtBuilder = Jwts.builder();
    jwtBuilder.setSubject(principal.getName());
    jwtBuilder.setIssuer(ISSUER);
    jwtBuilder.setIssuedAt(today);
    jwtBuilder.setExpiration(addDays(today, 7)); // Hardcoded expiration time

    // ... (additional code)

    // Request: Allow dynamic setting of token expiration time (in minutes or hours)
}

Please consider implementing this enhancement for better flexibility and security in managing JWT token expiration times. Feel free to reach out if further clarification.

Feel free to add specific implementation approaches in the comments, and I will try to create a PR by myself as soon as possible.

Best
DoPaNik