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