Due to an influx of spam, we have had to temporarily disable account registrations. Please write an email to accountsupport@archlinux.org, with your desired username, if you want to get access. Sorry for the inconvenience.
https://datatracker.ietf.org/doc/html/draft-ietf-httpapi-ratelimit-headers-00
Ref: !378 (comment 23518)