Don't need to handle authentication=None

it's always given and always a dict

Author: minrk

oauthenticator/globus.py

@@ -309,7 +309,7 @@ async def check_allowed(self, username, auth_model):
         # users should be explicitly allowed via config, otherwise they aren't
         return False
 
-    async def check_blocked_users(self, username, authentication=None):
+    async def check_blocked_users(self, username, authentication):
         """Check if the user should be blocked
 
         Called _before_ checking if the user should be allowed