ChatCompletionChunk missing usage property.

[jay-pulsifi]

Hi team,

Would like to request to add usage property in ChatCompletionChunk interface similar to ChatCompletion.

This would be helpful for our use case where it allow us to track the statistics of each request.

Thanks in advance

[jxnl]

where does this class come from?

[jay-pulsifi]

My apologies. I dropped a question on wrong repo.