[cobalt-security] user name = user

["Kai Schantz, Euroweb" <kai@xxxxxxxxxx>]

Hi,

One of our customer has made an user acount with the following data:

full name: user name
user name: user
email alias: user.name

I think this look a little rare and maybe there is some security
problem/holes with this?
Anybody now how to make this imposible for users to make acountnames like
this?
This was on a raq4r..


Kai Schantz
Euroweb AS