User Manager in V4Beta

At any time might mikrotik release any docs on the use of the new usermanager in V4Beta??
The user manager is quite nice, in comparison to the Previous OS versions.
That said Access to the web interface, is or must be, different.

user?subs= does not seem to work.
and following the failed subs= /userman no longer allow login.

These may just be bugs.
Or perhaps there are some new symantics.

it was released by mistake, current download files should not contain this version. we will release a better version in ~2months (I promise)