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