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