Handle rare case where user instance has no name assigned

InvenTree/users/models.py

@@ -216,7 +216,10 @@ class RuleSet(models.Model):
                     return True
 
         # Print message instead of throwing an error
-        logger.info(f"User '{user.name}' failed permission check for {table}.{permission}")
+        name = getattr(user, 'name', user.pk)
+
+        logger.info(f"User '{name}' failed permission check for {table}.{permission}")
+
         return False
 
     @staticmethod