@EventHandler
public void onVerificationFailed(TokenVerificationFailedEvent event) {
    String username = event.getUsername(); // USERNAME FROM THE BACKEND SERVER.
    String chronUsername = event.getChronUsername(); // USERNAME FROM THE BUNGEECORD SERVER.

    String token = event.getChronToken(); // TOKEN USED FOR VERIFICATION ON THE BUNGEECORD SERVER.

    event.getUUID(); // UUID FROM THE BACKEND SERVER.
    event.getChronUUID(); // UUID FROM THE BUNGEECORD SERVER.

    event.getAddress(); // IP ADDRESS FROM THE BACKEND SERVER.
    event.getChronAddress(); // IP ADDRESS FROM THE BUNGEECORD SERVER.

    TokenFailureReason reason = event.getFailureReason(); // ENUM INDICATING THE REASON FOR FAILURE.

    boolean cancel = event.isCancelled(); // CHECKS IF THE EVENT HAS BEEN CANCELLED.
    event.setCancelled(boolean); // SETS THE CANCELLATION STATE OF THE EVENT.

    AsyncPlayerPreLoginEvent mainEvent = event.getEventAsynchronously(); // RETRIEVES THE ASYNCHRONOUS PRE-LOGIN EVENT.
    PlayerLoginEvent mainEvent = event.getEventSynchronously(); // RETRIEVES THE SYNCHRONOUS LOGIN EVENT.

    event.disconnectAsynchronously(Result result, String reason); // DISCONNECTS THE USER ASYNCHRONOUSLY WITH A SPECIFIED RESULT AND REASON.
    event.disconnectSynchronously(Result result, String reason); // DISCONNECTS THE USER SYNCHRONOUSLY WITH A SPECIFIED RESULT AND REASON.
}

@EventHandler
public void onVerificationSuccess(TokenVerificationSuccessEvent event) {
    String username = event.getUsername(); // THE USERNAME OF THE PLAYER FROM THE BACKEND SERVER.
    String uuid = event.getUUID(); // THE UUID (UNIVERSALLY UNIQUE IDENTIFIER) OF THE PLAYER FROM THE BACKEND SERVER.
    String address = event.getAddress(); // THE IP ADDRESS OF THE PLAYER FROM THE BACKEND SERVER.
    String token = event.getToken(); // THE TOKEN THAT WAS SUCCESSFULLY VERIFIED FOR THE PLAYER.

    boolean cancel = event.isCancelled(); // CHECKS IF THE EVENT HAS BEEN CANCELLED.
    event.setCancelled(boolean); // SETS THE CANCELLATION STATE OF THE EVENT.

    AsyncPlayerPreLoginEvent mainEvent = event.getEventAsynchronously(); // RETRIEVES THE ASYNCHRONOUS PRE-LOGIN EVENT.
    PlayerLoginEvent mainEvent = event.getEventSynchronously(); // RETRIEVES THE SYNCHRONOUS LOGIN EVENT.

    event.disconnectAsynchronously(Result result, String reason); // DISCONNECTS THE USER ASYNCHRONOUSLY WITH A SPECIFIED RESULT AND REASON.
    event.disconnectSynchronously(Result result, String reason); // DISCONNECTS THE USER SYNCHRONOUSLY WITH A SPECIFIED RESULT AND REASON.
}

AddressUtils.getHostAddress(InetAddress); // IT RETRIEVES THE HOST ADDRESS, WHICH IS THE IP ADDRESS IN STRING FORMAT.

Base64Encoder.encodeBase64(String) // STRING ENCRYPTION E.G. TOKEN, IP ADDRESS.