[Twisted-Python] Authenticating users and refering them to personal URLs based on the authentication result.

[xif xif]

Hi

I'm just starting with Nevow, and wanted to know if this is possible,
and if so get a few leads.

I want:

1) to authenticate users (from a form with a "username" and a
"password" field) based on data stored in a database.

2) after authentication is performed, the user is sent to a URL  based
on some of the data from the database. For example, if the database
query revealed him to be named "John Smith", he shall be refered to
http://appserver.com/JohnDoe. Subsequently, he should remain at this
URL, and all links should refer to addresses "below" his personal
address. For example, http://appserver.com/JohnDoe/configuration,
http://appserver.com/JohnDoe/mail, etc.

Thanks in advance,

Xif