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