User usage query and budget limit

[krinlove99]

I have a self-deployed LiteLLM agent and added langfuse.

The Litellm support added through the pipeline in openwebui seems to be unable to pass in the userid (as shown by the default_user_id on the langfuse log, and the userid is not displayed in the usage), but the langfuse support added directly through the pipeline can display the log normally.

In addition: when I directly request litellm through http, if I pass in user:test, I can view the specific userid in langfuse.

How to solve this problem, or how to add a budget limit for each user? Thank you for your answer.