### Overview

We have some user accounts in the company that contain special characters, such as "\[\]". They are used to designate certain types of accounts and are coming from an external (corporate) system, so we can't control them.

The problem is, OpenProject does not allow creating users with such names, e.g. "\[SA\] Tester".

This is essentially is a blocker for our migration to OpenProject, as we can't change all those accounts, and we can't migrate without them.

### Steps to reproduce

Begin of the deletion _Please write down the steps to reproduce. Try to write down all necessary preconditions (what permissions do you have, are other users involved?). Example:_

End of the deletion 1. Create a user with full name "\[SA\] Tester" (Jira doesn't have separate fields for first/last name)

2. Assign an issue in a test project to that user.

3. In OpenProject, as a system administrator: go to Administration > Import > Jira

4. Provide connection details and choose the test project for import

5. Attempt to execute import.


### What is the buggy behavior?

* Import fails with "First name is invalid." error

* The same happens if I try to create a user with such name directly in OpenProject


### What is the expected behavior?

Begin of the deletion 1. End of the deletion OpenProject Begin of the insertionremoves the invalid characters forEnd of the insertion Begin of the deletion should import (or allow creating)End of the deletion such Begin of the insertionusers and continues importingEnd of the insertion Begin of the deletion userEnd of the deletion without errors Begin of the insertion

End of the insertion Begin of the deletion


End of the deletion ### Begin of the insertionOut of scope

Allowing all characters in usernames for import and/or creation of users

End of the insertion Begin of the deletion

End of the deletion ### Environment information

**OpenProject installation type**

* Docker-compose installation


**OpenProject version**

17.4

**Browser**

* [x] Chrome
* [x] Firefox
* [ ] Safari
* [ ] Mobile Safari
* [ ] Other (please specify)

**Operating System**

* [ ] Windows
* [ ] Mac OS X
* [ ] Mobile iOS
* [ ] Mobile Android
* [x] Linux (OracleLinux 8)
* [ ] Chrome OS
* [ ] Other (please specify)