public async Task <IActionResult> OnClientGone([FromBody] OnClientGonePayload request)
        {
            await ClientGone(request);

            return(Ok());
        }
 /// <summary>
 /// This event is called if a client using clean_session=true closes the connection or gets disconnected by a duplicate client.
 /// /// For more information <see cref="https://docs.vernemq.com/plugin-development/sessionlifecycle#on_client_gone"/>
 /// </summary>
 /// <param name="clientGonePayload"></param>
 /// <returns></returns>
 protected virtual async Task ClientGone(OnClientGonePayload clientGonePayload)
 {
     return;
 }