User.id for authenticated user id

[heyams]

Area(s)

area:user

Is your change request related to a problem? Please describe.

enduser.id has been deprecated and replaced with user.id. #731

enduser.id had this old description:

user.id has this new description:

The new description is confusing now. Is it for authenticated user id or anonymous user id? What are your thoughts on creating a new attribute called user.anonymous_id?

Our telemetry solution tracks both authenticated user id and anonymous user id.

Describe the solution you'd like

1. update the user.id description to make it clear that it's intended for authenticated user id.
2. create a new attribute call user.anonymous_id for the anonymous user id.

Describe alternatives you've considered

n/a

Additional context

n/a