Postgres Logins with Zeos

I appear to have a security problem with my Postgres DB.  I'm using D7
with Zeos 6.0.8 to write an app to use a Postgres database and my
login doesn't appear to care who I am, it just logs me in with full
access rights.  I know I've done something lame, I'm a newbie to Zeos
and Postgres both.  Can anyone help?

Jack