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