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