User's email control inconsistency

[Pachat]

Preflight Checklist

• I have completed all Troubleshooting Steps.
• I'm on the latest version of Directus.
• There's no other issue that already describes my problem.

Describe the Bug

There are at least 3 places where a user's email is concerned

• installation
• login
• user's detail

The login requires a valid email, but the installation and the user's detail don't.

As a result, in case of a mistake when editing the address, it is not possible to login.
Blocking the whole installation in case of the admin.

Even if this will not prevent from entering a wrong email address, it would be nice to have a control on a valid format address when installing or modifying a user's address.
Another solution would be to consider the login address as a mere username and get rid of the valid email requirement. Not to say that the email recover will then not be available.

To Reproduce

On

• install, answer "myemail" (without @mydomain.com)
  or on
• user's detail: modify the email to "myemail" (without @mydomain.com)

Errors Shown

The user cannot login anymore.
And if is the admin (sure admin should pay attention ;), there is no way to recover by modifying the row (as it is fortunately protected as read-only in the database).

What version of Directus are you using?

9.4.0

What version of Node.js are you using?

14.17.1

What database are you using?

SQLite

What browser are you using?

Firefox

What operating system are you using?

Windows_NT 10.0.19043

How are you deploying Directus?

locally