Session interface does not provide extraData

[BarbecueSilver]

Bug report

Describe the bug

The Session interface in packages/types/src/types/session/session.ts does not contain the optional extraData property of type object.
extraData should contain at least impersonatorUserId (optional).

To Reproduce

In the IDE the return value for findSessionByAccessToken(...) does not contain the above mentioned properties, but when you:

1. Login as a user
2. Start impersonating any other user
3. Use that authToken to await accountsServer.findSessionByAccessToken(authToken);
4. Check the result of the promise - it contains extraData: { impersonatorUserId: 'someId123321' }, as well.

Expected behavior

IDE should show that Session may also contain optional extraData (and within optional impersonatorUserId).

Additional context

Discussion