[Modify] Move it

websocket-sharp/Net/HttpConnection.cs

@@ -302,6 +302,9 @@ namespace WebSocketSharp.Net
             conn._lastListener = lsnr;
           }
 
+          if (!conn._context.Authenticate ())
+            return;
+
           if (conn._context.Register ())
             conn._contextRegistered = true;
 

websocket-sharp/Net/HttpListener.cs

@@ -582,9 +582,6 @@ namespace WebSocketSharp.Net
       if (!_listening)
         return false;
 
-      if (!context.Authenticate ())
-        return false;
-
       lock (_ctxRegistrySync) {
         if (!_listening)
           return false;