postgres and passwordless authentication We have users for out postgres database and none have passwords... Do not know the history behind it.

When I try to use clients to connect to these databases, for instance, pgadmin III, the connection always fails due to the lack of password.

How does one overcome this? I do not want to create username with passwords just to get around this. Sometimes that is not an option.

Thoughts?
Do you have administrative access to the database? 

If so you can edit pg_hba.conf to adjust access control configuration. See http://developer.postgresql.org/pgdocs/postgres/auth-pg-hba-conf.html

After you make changes issue pg_ctl reload or restart the database.