public async Task <IActionResult> Put(Guid id, [FromBody] UpdateMeetupCommand command, CancellationToken cancellationToken)
        {
            command.MeetupId = id;

            await _mediator.Send(command, cancellationToken);

            return(Ok());
        }
 public void Handle(UpdateMeetupCommand message)
 {
     throw new NotImplementedException();
 }