In the rich text editor:
@wild_cinders
In a comment:
[wild_cinders](https://chowlings.com/user/wild_cinders)
For Names and Avatars:
In the rich text editor:
%wild_cinders
In a comment:
[](https://chowlings.com/user/wild_cinders) [wild_cinders](https://chowlings.com/user/wild_cinders)