GoogleSafeBrowsing api с помощью библиотеки safebrowsinglookup

Question

Я очень новичок в программировании и хочу проверить, безопасен ли URL клиента или подозревается ли он в вредоносном ПО.Ссылка на библиотеку: https://github.com/acastaner/safebrowsinglookup

LookupClient client = new LookupClient("someApiKey", "someClientName");
ResponseType response = client.Lookup(url);
switch (response)
   {
       case ResponseType.OK:
           consoleMessage = "URL appears to be safe.";
           break;

       case ResponseType.MALWARE:
           consoleMessage = "URL is suspected of hosting malware.";
           break;

       case ResponseType.MALWARE_UNWANTED:
           consoleMessage = "URL is suspected of hosting malware and unwanted software.";
           break;

           case ResponseType.PHISHING:
           consoleMessage = "URL is suspected of phishing.";
           break;

       case ResponseType.PHISHING_MALWARE:
           consoleMessage = "URL is suspected of phishing and hosting malware.";
           break;

       case ResponseType.PHISHING_MALWARE_UNWANTED:
           consoleMessage = "URL is suspected of phishing and hosting malware and unwanted software.";
           break;

       case ResponseType.PHISHING_UNWANTED:
           consoleMessage = "URL is suspected of phishing and hosting unwanted software.";
           break;

       case ResponseType.UNWANTED:
           consoleMessage = "URL is suspected of hosting unwanted software.";
           break;

   }

Я получаю сообщение об ошибке типа

Невозможно скрыть преобразование типа System.Threading.Tasks.Task в SafeBrowsingLookup.ResponseType "в" ResponseType response= client.Lookup (url);