Extend validation for usernames
When registering or updating account information, add more checks on the username (which is used as identifier). Usernames:
Submitted by Elmer van Chastelet on 12 March 2025 at 14:21
- must start with a letter, number, or underscore
- must be at least 3 characters long
- can only include spaces, dots (.), underscores (), hyphens (-), and @