=====Postgresql=====\\
##sudo -u postgres psql\\
postgres=# CREATE database mydb;\\
postgres=# CREATE user myuser with encrypted password 'mypass';\\
postgres=# grant all privileges on database mydb to myuser;\\
postgres=# ALTER ROLE myuser WITH LOGIN;##\\

=====Mysql=====\\
##CREATE USER 'user'@'localhost' IDENTIFIED WITH mysql_native_password BY 'password';\\
CREATE DATABASE mydb;\\
grant all privileges ON mydb.* TO 'myuser'@'localhost';##