removed whitespace from line 431 as per Lint Test #364

Author: Imam Khan

django_auth_adfs/backend.py

@@ -428,7 +428,7 @@ def authenticate(self, request=None, authorization_code=None, **kwargs):
         if request and hasattr(request, "session"):
             username_claim = settings.USERNAME_CLAIM
             request.session["username_claim"] = claims[username_claim]
-            
+    
         user = self.process_access_token(access_token, adfs_response)
         return user