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