In the rich text editor:
@StupidRelatable
In a comment:
[StupidRelatable](https://cometcrashers.org/user/StupidRelatable)
For Names and Avatars:
In the rich text editor:
%StupidRelatable
In a comment:
[![StupidRelatable's Avatar](https://cometcrashers.org/images/avatars/default.jpg?v=1714495547)](https://cometcrashers.org/user/StupidRelatable) [StupidRelatable](https://cometcrashers.org/user/StupidRelatable)