In the rich text editor:
@Meowlotov
In a comment:
[Meowlotov](https://chowlings.com/user/Meowlotov)
For Names and Avatars:
In the rich text editor:
%Meowlotov
In a comment:
[![Meowlotov's Avatar](https://chowlings.com/images/avatars/648.png?v=1658921412)](https://chowlings.com/user/Meowlotov) [Meowlotov](https://chowlings.com/user/Meowlotov)