[core] Fix Spnego has conflict with timer metrics
@@ -544,7 +544,7 @@ class SpnegoDjangoBackend(django.contrib.auth.backends.ModelBackend):
"""
@metrics.spnego_authentication_time
- def authenticate(self, username=None):
+ def authenticate(self, request=None, username=None):
username = self.clean_username(username)
username = force_username_case(username)
is_super = False
