Dear users is there any posibility , of generate some some validation like is_user_in(credentials, int) ----> this consult the table SER-->"group" if a user have credentials like INT, to enable INTERNATIONAL calls have_user_balance (balance, 0)----> this can consult a table ser-->balance to ask if a user have a balance > 0 to get access to INT calls ??? if the balance < 0 can be break.
any help can be greattly thanks
Best Regards
Gustavo Villegas