Fix backend test

server/users/managers.py

@@ -99,7 +99,7 @@ class UserManager(DjangoUserManager):
         return user
 
     def create_user_with_random_password(self, first_name, last_name, email):
-        user = self._create_user_with_random_password_no_save()
+        user = self._create_user_with_random_password_no_save(first_name, last_name, email)
         user.save()
         return user