Do Not Reuse Usernames

How it is checked

Audit method: Manual review

This recommendation cannot be checked automatically. A scan lists it with these instructions when you pass --include-manual.

List accounts: SELECT host, user, plugin FROM mysql.user WHERE user NOT IN ('mysql.infoschema','mysql.session','mysql.sys'); Each account must belong to exactly one system account, person or application; shared or reused usernames are a fail.

How it is fixed

Fix method: Guidance or infrastructure patch

Create a separate account per person, application and system account, migrate their grants, and drop the shared accounts.