It is important to know when an Admin user becomes another user and which user they become for auditing and tracking purposes.
Please add an event such as:
that records the Admin user, the session ID, and a REF for the ID of the user they become.
Not as critical, but interesting, would to also add tracking for the View User Info function. That event would be something like:
which would also record the Admin user, the session ID, and a REF for the ID of the user they look up.