In the rich text editor:
@Tokyo_lightz
In a comment:
[Tokyo_lightz](https://chowlings.com/user/Tokyo_lightz)
For Names and Avatars:
In the rich text editor:
%Tokyo_lightz
In a comment:
[![Tokyo_lightz's Avatar](https://chowlings.com/images/avatars/default.jpg)](https://chowlings.com/user/Tokyo_lightz) [Tokyo_lightz](https://chowlings.com/user/Tokyo_lightz)