async notifyTokenExpired(connectionId) {
    await this._dispatch(
      "notify:server",
      [KUZZLE_NOTIFICATION_CHANNEL], // Sending notification on Kuzzle notification channel
      new ServerNotification("TokenExpired", "Authentication Token Expired"),
      connectionId,
    );

    await this.module.hotelClerk.removeConnection(connectionId);
  }
Send a "token expired" notification to the target user

@param {string} connectionId - User's connection identifier
@returns {Promise}