MariaDB/MySQL secure users

This bunch of scripts was created to secure MySQL/MariaDB users. Purporses:
a- password expires > 120d
b- account lock on >3 authentication fails
c- account lock if not logged in for more than 30d

Files description:

00_create_db_user.sql

Create admin database, tables and users and define init settings for "a" and "b"

01_AuditLoginTrigger.sql

Create Audit Login Trigger for enabling "c"

02_LockInactiveUsers.sql

Procedure that locks user accounts not logged in for more than 30d and displayed in "dbadmin.aud_login", as required in "c"

03_extra_grants.sql

Extra grants to dbadmin user

04_EventScheduler.sql

Create Event to schedule Lock inactive users and grant audit to users that were created without audit-login. Automate "c".