[TYPO3] Logging to typo3 using special url

[Vahan Amirbekyan]

I saw somewhere in the specs and also was advised that this url should 
log a user in T3 FE.
mydomain.com/?logintype=login&user=<username>&pass=<password>&pid=<usersPID>

but it does not work.
should some install parameters be enabled for this too?

Vahan