In the rich text editor:
@beetlebugs
In a comment:
[beetlebugs](https://chowlings.com/user/beetlebugs)
For Names and Avatars:
In the rich text editor:
%beetlebugs
In a comment:
[![beetlebugs's Avatar](https://chowlings.com/images/avatars/477.png?v=1644063297)](https://chowlings.com/user/beetlebugs) [beetlebugs](https://chowlings.com/user/beetlebugs)