In the rich text editor:
@turrent
In a comment:
[turrent](https://chowlings.com/user/turrent)
For Names and Avatars:
In the rich text editor:
%turrent
In a comment:
[![turrent's Avatar](https://chowlings.com/images/avatars/default.jpg)](https://chowlings.com/user/turrent) [turrent](https://chowlings.com/user/turrent)