_Pg module and CGI

[John]

Hi, assuming to build an application getting SQL statement from html form
and processing the query in postgresql, how can I add this "web user" to
access the database?

Error I get:
Traceback (most recent call last): File "c:\inetpub\scripts\sd.cgi", line
15, in ? db=_pg.connect('template1','localhost') _pg.error: FATAL 1: user
"IUSR_VALUED-VYL4TJPA" does not exist

Remedy I tried:
adduser IUSR_VALUED-VYL4TJPA in UNIX prompt
(but there wasn't such command)

I'd appreciate your help very much!