public async Task DeleteAsync(string userId)
{
Console.WriteLine($"Deleting user {userId}..");
await _mediator.NotifyAsync(this, new UserDeletionEvent { UserId = userId });
}
public async Task CompleteOrderAsync(string userId, string orderId)
{
Console.WriteLine($"Order {orderId} completed.");
await _mediator.NotifyAsync(this, new OrderCompletionEvent { UserId = userId });
}