What are some commands to list your user accounts on postgresql?

There are createuser & dropuser commands.

createuser - define a new PostgreSQL user account
dropuser - remove a PostgreSQL user account

Is there a way to list user accounts?

These two commands do not require the user to invoke psql nor understand details of using it.

Use the psql shell and.

\deu[+] [PATTERN] such as.

postgres=# \deu+
      List of user mappings
 Server | User name | FDW Options
--------+-----------+-------------
(0 rows)

And for all users.

postgres=# \du
                              List of roles
 Role name  |                   Attributes                   | Member of
------------+------------------------------------------------+-----------
 chpert.net |                                                | {}
 postgres   | Superuser, Create role, Create DB, Replication | {}

Also such as mysql, you can do .

$ psql -c "\du"
                             List of roles
 Role name |                   Attributes                   | Member of
-----------+------------------------------------------------+-----------
 chpert    |                                                | {}
 postgres  | Superuser, Create role, Create DB, Replication | {}
 test      |                                                | {}