[Users] load from db table

[D'Addelfio Davide]

Hi Bogdan,

i setup my openser.cfg to store SIP messages into acc tables of mysql,
using extra accounting to store also the body part of the message. 
Now i need that openser read into that db's table, in particular in some
rows of db.
If I use avp_db_load it works only over usr_preference table, instead I
want it looks into acc table. 

How can I do? 

Thanks for help
Davide