In the rich text editor:
@weretaur
In a comment:
[weretaur](https://www.chowlings.com/user/weretaur)
For Names and Avatars:
In the rich text editor:
%weretaur
In a comment:
[](https://www.chowlings.com/user/weretaur) [weretaur](https://www.chowlings.com/user/weretaur)