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