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