public async Task StartAsync(CancellationToken cancellationToken)
 {
     await Task.Run(async() =>
     {
         var mediator = _provider.GetRequiredService <IMediator>();
         while (!cancellationToken.IsCancellationRequested)
         {
             var status = new AppStatus()
             {
                 Value     = "App 1",
                 When      = DateTimeOffset.Now,
                 MessageId = Guid.NewGuid(),
             };
             _logger.WithDebug($"App 1 Sending Status: {status.MessageId}").Log();
             await mediator.Publish(new OutboundNotification()
             {
                 Topic       = $"bct/app/status",
                 Message     = status,
                 MessageType = status.GetType().Name
             }, cancellationToken);
             await Task.Delay(10000, cancellationToken);
         }
     }, cancellationToken);
 }