Failed to start Claude Code: unexpected kwargs: user

[an9xyz]

I noticed that in the current codebase at types.py#L677, there seems to be a user field defined.
However, when I try to use it, it appears to be non-functional or has been deprecated. Could you please clarify:

Is the user field still supported in the current version?
If it has been deprecated, what is the recommended alternative?
Should this field be removed from the type definitions to avoid confusion?

Environment:

SDK Version: [0.1.26]
Python Version: [3.12.12]

Thanks for your help!