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