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