[Users] How to write auth username to an AVP (with avpops) for future checking?

[Marcello Lupo]

Hi,
probably a stupid question, but how to write the auth username passed on 
authentication to an AVP?? I tried to access $ua pseudo variable in openser 
to get it in to the AVP but it failed, obviously.As the docs says the pseudo 
variables are accessible only for avp_print function.
Any help?
Thanks,
Bye,
Marcello