We have the current versions of both phpPgAdmin and PostgreSQL installed. We can access the PostgreSQL server from the phpPgAdmin with the username and password that was created at installation.
We need to add an additional username and password (that is different from the original one).
How do you add users?
The first level in the tree browser under servers is the cluster name. To add new users, you click on the cluster name, then look for the roles option. (roles are cluster wide)