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