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