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