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