Make Pastebin data-source only available with an API key

resources/scripts/api/pastebin.ads

@@ -10,20 +10,36 @@ function start()
     set_rate_limit(1)
 end
 
+function check()
+    local c
+    local cfg = datasrc_config()
+    if cfg ~= nil then
+        c = cfg.credentials
+    end
+
+    if (c ~= nil and c.key ~= nil and c.key ~= "") then
+        return true
+    end
+    return false
+end
+
 function vertical(ctx, domain)
     local c
     local cfg = datasrc_config()
     if cfg ~= nil then
         c = cfg.credentials
     end
 
+    if (c == nil or c.key == nil or c.key == "") then
+        return
+    end
+
     local resp, err = request(ctx, {url=search_url(domain)})
     if (err ~= nil and err ~= "") then
         log(ctx, "vertical request to service failed: " .. err)
         return
     end
 
-    send_names(ctx, resp)
     if (c == nil or c.key == nil or c.key == "") then
         return
     end