In the rich text editor:
@SpamJamz
In a comment:
[SpamJamz](https://chowlings.com/user/SpamJamz)
For Names and Avatars:
In the rich text editor:
%SpamJamz
In a comment:
[![SpamJamz's Avatar](https://chowlings.com/images/avatars/109.png?v=1653238749)](https://chowlings.com/user/SpamJamz) [SpamJamz](https://chowlings.com/user/SpamJamz)