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