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