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