CacheCow client with authentication

WithCacheCowClient.cs

    public class RunWithCacheCow
    {
        private readonly HttpClient _client;

        public RunWithCacheCow()
        {
            var httpClientHandler = new HttpClientHandler()
            {
                Credentials = new NetworkCredential("test", "test"),
            };


            _client = ClientExtensions.CreateClient(httpClientHandler);
            _client.DefaultRequestVersion = HttpVersion.Version20;
        }

        public async Task Run()
        {
            try
            {
                var response = await _client.GetStringAsync("https://localhost:55511/WeatherForecast/london");

                Console.WriteLine(response);
            }
            catch (HttpRequestException e)
            {
                Console.WriteLine("\nException Caught!");
                Console.WriteLine("Message :{0} ", e.Message);
            }
        }
    }