In the rich text editor:
@avik0u
In a comment:
[avik0u](https://chowlings.com/user/avik0u)
For Names and Avatars:
In the rich text editor:
%avik0u
In a comment:
[](https://chowlings.com/user/avik0u) [avik0u](https://chowlings.com/user/avik0u)
