potionsandsnitches.net doesn't require login. Indeed, it doesn't even have the same login URL.

twilighted.py

@@ -28,7 +28,11 @@ class Twilighted(FanfictionSiteAdapter):
 
 
   def requiresLogin(self, url = None):
-    return True
+    # potionsandsnitches.net doesn't require login.
+    if self.host == 'potionsandsnitches.net':
+      return False
+    else:
+      return True
 
   def performLogin(self, url = None):
     data = {}
@@ -135,4 +139,4 @@ class Twilighted_UnitTests(unittest.TestCase):
     self.assertEquals(32, len(Twilighted(url).extractIndividualUrls()))
 
 if __name__ == '__main__':
-  unittest.main()
+  unittest.main()