Convert VK to use Response URL detection. For some reason, a query against a known profile (e.g. https://vk.com/smith), would return a 418 HTTP Status. Which is odd, because this HTTP Status means "I'm a teapot". It was defined as an April Fools' joke in 1998. If I use the Response URL detection method, I am able to get around this issue. Add to tests.

data.json

@@ -993,10 +993,13 @@
     "username_unclaimed": "noonewouldeverusethis7"
   },
   "VK": {
-    "errorType": "status_code",
+    "errorType": "response_url",
+    "errorUrl": "https://www.quora.com/profile/{}",
     "rank": 15,
     "url": "https://vk.com/{}",
-    "urlMain": "https://vk.com/"
+    "urlMain": "https://vk.com/",
+    "username_claimed":   "smith",
+    "username_unclaimed": "noonewouldeverusethis7"
   },
   "VSCO": {
     "errorType": "status_code",