Sorry @KTLighing, the editing tools I have don't let me change user names. I believe full staff members may be able to, so I'll tag @MaryD in the hope that she can help. What change do you want to make? Alex.
Is there any update on this ? I have just created mine, but I have been too quick and pressed create account. I wanted to get : sylvanoMTL, rather than sylvain (my firstname).
Only backend admins can change usernames (as it affects content assignments as well). Updated yours to sylvanoMTL