Access additional metadata in CustomLogger

[gustavz]

Hi I want to use CustomLogger to create a callback handler that reports to our internal metering service.
How do I best make additional (non-litellm) metadata liker user_id available for the callback?

I hoped to be able to access them from kwargs as I was expecting litellm.completion or litellm.acompletion to let me pass these through as kwargs added to the call, but that's not the case, it errors with Unrecognized request argument supplied.

My plan B is to set them in the init of the handler, but this requires reinstantiating all callbacks for each call which is not desired.

So my question is if there is any known solution of how to pass additional metadata through the completion and make them accessible in the callbacks?

[gustavz]

ok found that there is a metadata arg for that :D