In the rich text editor:
@1lineyka
In a comment:
[1lineyka](https://chowlings.com/user/1lineyka)
For Names and Avatars:
In the rich text editor:
%1lineyka
In a comment:
[![1lineyka's Avatar](https://chowlings.com/images/avatars/default.jpg)](https://chowlings.com/user/1lineyka) [1lineyka](https://chowlings.com/user/1lineyka)