Minor issue that caused me some head scratches.

There's this example with an inaccurate comment in readme:

const sql = postgres({ ...options }) // will default to the same as psql

In psql, if you omit database name, it defaults to user name. So psql -U dummy connects to database dummy, and PGUSER=funny psql connects to database funny.

pg (node-postgres) mimics this behaviour

With this module, if you don't set PGDATABASE in env or the corresponding option, it always connects to database postgres, ignoring PGUSER var.