To create a new user within MYSQL, login to your server then complete the commands below. In the alternative, an appropiate administrator account can execute the same commands within phpMyAdmin or other comparable GUI.
mysql -u root -p Password: enter your password mysql> CREATE USER 'custom'@'localhost' IDENTIFIED BY 'obscure'; mysql> GRANT SELECT,INSERT,UPDATE,DELETE,CREATE,DROP ON bankaccount.*TO 'custom'@'localhost';
This code will create a new mysql user named 'custom' with a password of 'obscure' which can access the database bankaccount and all the tables within it.