Create a Mysql db with user and grant permissions, replace ##DBNAME## with database name and ##DBUSER## with username and ##DBPASSWORD## with new user password

create_mysql_db

CREATE DATABASE  IF NOT EXISTS  ##DBNAME##;

GRANT ALL on ##DBNAME##.* to '##DBUSER##'@'%' identified by '##DBPASSWORD##';

GRANT ALL on ##DBNAME##.* to '##DBUSER##'@'localhost' identified by '##DBPASSWORD##';

USE  ##DBNAME##;