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