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