In the rich text editor:
@GO0BER
In a comment:
[GO0BER](https://chowlings.com/user/GO0BER)
For Names and Avatars:
In the rich text editor:
%GO0BER
In a comment:
[![GO0BER's Avatar](https://chowlings.com/images/avatars/default.jpg)](https://chowlings.com/user/GO0BER) [GO0BER](https://chowlings.com/user/GO0BER)