reating user, database and adding access on PostgreSQL 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;