private async Task RunParser()
        {

            for (int i = 0; i < 3; i++)
            {
                int count = 25;
                var slim = new SemaphoreSlim(count);
                var threads = new List<Task>();
                await foreach (var url in parser.GetUrlsForParser(count))
                {
                    if (cancellationToken.IsCancellationRequested)
                    {
                        break;
                    }
                    await slim.WaitAsync();

                    var t = Task.Run(async () =>
                    {
                        try
                        {
                            var page = await parser.ParserPageAsync(url);
                            foreach (var item in page.OlxAds)
                            {
                                olxAds.Add(item);
                            }
                            slim.Release();
                        }
                        catch (Exception ex)
                        {
                        }
                    });
                    threads.Add(t);
                }

                //Task.WaitAll(threads.ToArray());
                await Task.WhenAll(threads);
                threads.ForEach(t => t.Dispose());



                await WriterAds(olxAds);
                await Task.Delay(TimeSpan.FromMinutes(3));
                olxAds.Clear();
                threads.Clear();
            }