CREATE_USER (7) - Linux Manuals
CREATE_USER: define a new database role
NAME
CREATE_USER - define a new database role
SYNOPSIS
CREATE USER name [ [ WITH ] option [ ... ] ] where option can be: SUPERUSER | NOSUPERUSER | CREATEDB | NOCREATEDB | CREATEROLE | NOCREATEROLE | CREATEUSER | NOCREATEUSER | INHERIT | NOINHERIT | LOGIN | NOLOGIN | REPLICATION | NOREPLICATION | CONNECTION LIMIT connlimit | [ ENCRYPTED | UNENCRYPTED ] PASSWORD 'password' | VALID UNTIL 'timestamp' | IN ROLE role_name [, ...] | IN GROUP role_name [, ...] | ROLE role_name [, ...] | ADMIN role_name [, ...] | USER role_name [, ...] | SYSID uid
DESCRIPTION
CREATE USER is now an alias for CREATE ROLE (CREATE_ROLE(7)). The only difference is that when the command is spelled CREATE USER, LOGIN is assumed by default, whereas NOLOGIN is assumed when the command is spelled CREATE ROLE.
COMPATIBILITY
The CREATE USER statement is a PostgreSQL extension. The SQL standard leaves the definition of users to the implementation.