[Typo3] tt_products shop and password protected pages

[Harry Jung]

JoH schrieb:
> So if you set something to "required" which is not available form the
> current fe_user's fields this value will not be submitted.

i understand...thanks, this explains a lot.

> Change your fe_user or unset the "required" flag for some fields.

where can i find these fields ?

I Searched in the 'fe_admin_fe_users.tmpl' but there is no 
login-procedure indicated, only creating users.

I also searched in the ../t3lib/class.t3lib_userauth.php, but where is 
the right switch, here ?

Thanks.

Harry Jung