[lib] reduce currentUserInfo on identity login/register

Summary:
issue: ENG-6416
We want to set the new currentUserInfo after successful with with identity

Test Plan: Dispatched identity login action and checked that the currentUserInfo is set in redux

Reviewers: tomek, kamil, michal, varun

Reviewed By: tomek

Subscribers: ashoat

Differential Revision: https://phab.comm.dev/D11140