RomM version
4.8.1 (docker)

Describe the bug
All my usernames have a . in them. ROMM doens't allow usernames with a . in them, but if a username is supplied via OIDC with a . in it then the account will be created.

However you cannot edit the account settings (such as promoting the user to an admin) unless you first rename the account to remove the .

To Reproduce
Steps to reproduce the behavior:

1. Configure ROMM to use OIDC
2. Use OIDC to login to ROMM with an account with a username that features a . in it
3. Login using a different admin account
4. Attempt to edit the account created in step 2.

Expected behavior
Personally I don't see the issue with allowing usernames with a . in them. However if you want to keep banning them, then either the OIDC login should fail, or the . should be replaced with an allowed character, such as a -

Screenshots
If applicable, add screenshots to help explain your problem.

Server (please complete the following information):

• OS: Debian 13 LXC running on proxmox. ROMM is running as a docker container

Client (please complete the following information):

• Device: Laptop
• OS: Ubuntu 24.04.4 LTS
• Browser Chrome
• Version Version 147.0.7727.116 (Official Build) (64-bit)