[Serusers] Help with authorization

[Steve Blair]

  I have a working 0.9.1 config to which I would like add server side
features such as call forward all (cfwdall). I have a pretty good idea
how to handle cfwdall using avp_ops however I'm stuck on the
authentication.

  If a subscriber has local calling permissions (acl=local) and cfwdall
their phone to a long distance number I need to respond with an
informative response.

  In the INVITE processing in my config I have statements such as:

        if (is_user_in("credentials", "ld")) {
          setflag(11);
        };

  These checks fail with the following errors:

  Apr 21 18:31:53 ser[498]:  [SER]: AVP: Checking From gateway caller
  Apr 21 18:31:53 ser[498]: check_username(): No authorized credentials 
found (error in scripts)
  Apr 21 18:31:53 ser[498]: check_username(): Call {www,proxy}_authorize 
before calling
         check_* function !
  Apr 21 18:31:53 ser[498]: [SER]: Flag for UMVM redirect successful.
  Apr 21 18:31:53 ser[498]:  [SER]: AVP: Checking credentials
  Apr 21 18:31:53 ser[498]: is_user_in(): No authorized credentials 
found (error in scripts)

   I thought adding proxy_authorize("", "subscriber")), check_to and 
check_from calls prior
to the is_user_in check would address these errors but that hasn't 
worked either.

    If I want to set a flag if the caller is an authorized subscriber, 
the callee is an
authorized subscriber and then use "is_user_in" to determine if the 
called party has
a particular credential what am I missing?

Thanks,Steve