how to create new user and database in postgres code example

Example 1: psql create user

# https://www.postgresql.org/docs/8.0/sql-createuser.html
CREATE USER  WITH PASSWORD '' VALID UNTIL '';

Example 2: create and attach user to a postgresql database

sudo -u postgres psqlpostgres=# create database mydb;postgres=# create user myuser with encrypted password 'mypass';postgres=# grant all privileges on database mydb to myuser;