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