LogCommandHandler.cs

public class LogCommandHandler : IRequestHandler<LogCommand>
{
    private readonly ILogger<LogCommandHandler> _logger;

    public LogCommandHandler(ILogger<LogCommandHandler> logger) => _logger = logger;

    public Task<Unit> Handle(LogCommand request, CancellationToken cancellationToken)
    {
        _logger.LogInformation("---- Received message: {Message} ----", request.Message);
        return Task.FromResult(Unit.Value);
    }
}