In the rich text editor:
@cryptidcreep
In a comment:
[cryptidcreep](https://chowlings.com/user/cryptidcreep)
For Names and Avatars:
In the rich text editor:
%cryptidcreep
In a comment:
[![cryptidcreep's Avatar](https://chowlings.com/images/avatars/1093.jpg?v=1645306327)](https://chowlings.com/user/cryptidcreep) [cryptidcreep](https://chowlings.com/user/cryptidcreep)