In the rich text editor:
@m0thsphynx
In a comment:
[m0thsphynx](https://chowlings.com/user/m0thsphynx)
For Names and Avatars:
In the rich text editor:
%m0thsphynx
In a comment:
[![m0thsphynx's Avatar](https://chowlings.com/images/avatars/434.png?v=1644063293)](https://chowlings.com/user/m0thsphynx) [m0thsphynx](https://chowlings.com/user/m0thsphynx)