In the rich text editor:
@EggnogDestroyer1000
In a comment:
[EggnogDestroyer1000](https://chowlings.com/user/EggnogDestroyer1000)
For Names and Avatars:
In the rich text editor:
%EggnogDestroyer1000
In a comment:
[![EggnogDestroyer1000's Avatar](https://chowlings.com/images/avatars/1782.jpg?v=1672288410)](https://chowlings.com/user/EggnogDestroyer1000) [EggnogDestroyer1000](https://chowlings.com/user/EggnogDestroyer1000)