Accidentally deleted forum user

Hello Webteam,

as I am a moderator for the Web Forum I regularly clean up the spam postings. 

Today I made a terrible mistake because I had two browser windows open and I Accidentally deleted a user who is most definitely not a spammer: Mack05 (because I thought I was viewing a different message).

How should we proceed with this? I don't know how I can rich him (or her). 

I was thinking about posting a message in the forum, but I'm not sure in which sub-forum. Most probably "NetBeans Users" and maybe "NetBeans Community Corner" because I assume those would be the ones that user would look into if he/she notices.

I'm sorry for making such a mistake.

Kind regards
Thomas