fix: pass organization_ids=None in get_users test calls

When calling get_users() directly (not via FastAPI), Query() defaults
are not resolved. Pass organization_ids=None explicitly to avoid
'Query' object has no attribute 'split' error.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: yuneng-jiang

tests/test_litellm/proxy/management_endpoints/test_internal_user_endpoints.py

@@ -502,7 +502,7 @@ async def mock_get_user_key_counts(*args, **kwargs):
 
     # Call get_users function directly with proxy admin auth
     admin_key = UserAPIKeyAuth(user_id="admin", user_role=LitellmUserRoles.PROXY_ADMIN)
-    response = await get_users(page=1, page_size=1, user_api_key_dict=admin_key)
+    response = await get_users(page=1, page_size=1, user_api_key_dict=admin_key, organization_ids=None)
 
     print("user /list response: ", response)
 
@@ -1427,15 +1427,15 @@ async def mock_get_user_key_counts(*args, **kwargs):
     admin_key = UserAPIKeyAuth(user_id="admin", user_role=LitellmUserRoles.PROXY_ADMIN)
 
     captured_where_conditions.clear()
-    await get_users(user_ids="test-user", page=1, page_size=1, user_api_key_dict=admin_key)
+    await get_users(user_ids="test-user", page=1, page_size=1, user_api_key_dict=admin_key, organization_ids=None)
 
     assert "user_id" in captured_where_conditions
     assert "contains" in captured_where_conditions["user_id"]
     assert captured_where_conditions["user_id"]["contains"] == "test-user"
     assert captured_where_conditions["user_id"]["mode"] == "insensitive"
 
     captured_where_conditions.clear()
-    await get_users(user_ids="user1,user2,user3", page=1, page_size=1, user_api_key_dict=admin_key)
+    await get_users(user_ids="user1,user2,user3", page=1, page_size=1, user_api_key_dict=admin_key, organization_ids=None)
 
     assert "user_id" in captured_where_conditions
     assert "in" in captured_where_conditions["user_id"]