In the rich text editor:
@Potat-Queen
In a comment:
[Potat-Queen](https://www.whistlercrest.com/user/Potat-Queen)
For Names and Avatars:
In the rich text editor:
%Potat-Queen
In a comment:
[](https://www.whistlercrest.com/user/Potat-Queen) [Potat-Queen](https://www.whistlercrest.com/user/Potat-Queen)