Username can't start with a number
https://twitter.com/kaptenrobert/status/733389107150389248
@bitmasknet My pre-existing riseup account starts with a number. I can not enter any usename starting with a number in the client. Why?
I tried, and this looks like the case indeed. Can we enlarge the allowed characters there?
(from redmine: created on 2016-06-02)