[lib] pass entire loginInInfo to server call

Summary:
This diff introduces passing the source field to the keyserver to distinguish between different log-in scenarios (task).

Test Plan: Log input param in this line and check if source properly passed for both undefined (e.g. login from form) and defined source (e.g. cookie expired).

Reviewers: tomek, atul, abosh

Reviewed By: tomek

Subscribers: ashoat, atul, abosh

Differential Revision: https://phab.comm.dev/D5228