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