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