[Bug]: Create new user errors when closed out prematurely then reopened (user already exists)

[lukasmatourek]

⚠️ This issue respects the following points: ⚠️

• This is a bug, not a question or a configuration/webserver/proxy issue.
• This issue is not already reported on Github OR Nextcloud Community Forum (I've searched it).
• Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
• I agree to follow Nextcloud's Code of Conduct.

Bug description

When create new user in UI and accidentally click out of dialog with form where fields are filled (username, password,...) and click again on Create User and fill the same as before but finish it successfully, I get error message that user with username already exists. The user is created anyway so it is not big deal.

Steps to reproduce

1. Log In as admin
2. Go to Users and click Create User
3. Fill some fields, username at least
4. Click out of the dialog window, so it will close
5. Try to create the same user again
6. Finish the creation properly, you should get error message on top right corner that the user with this username already exists but the new user is created anyway

Expected behavior

The message that user already exists should not be displayed as you did not finish the creation process and closed the dialog accidentally.

Installation method

Community Docker image

Nextcloud Server version

28

Operating system

Debian/Ubuntu

PHP engine version

None

Web server

Apache (supported)

Database engine version

PostgreSQL

Is this bug present after an update or on a fresh install?

Fresh Nextcloud Server install

Are you using the Nextcloud Server Encryption module?

None

What user-backends are you using?

• Default user-backend (database)
• LDAP/ Active Directory
• SSO - SAML
• Other

Configuration report

No response

List of activated Apps

No response

Nextcloud Signing status

No response

Nextcloud Logs

No response

Additional info

I would disable closing the dialog window when user clicks out of the dialog. It is annoying behaviour of many applications that you have work in progress and accidentally click out of dialog and the work is gone. It is not big deal, just idea for improvement.

[pringelmann]

No longer reproduces on master: the dialog can't be dismissed by clicking outside, and the form resets on close since #59406. Verified on current master.