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