Username rocket chat with specific carater (!-*%) and that could be rename
@aboire : fr : pas d'espace pas de caractére speciaux et pas changeable, car dans rocket si tu change la liaison des messages va merder dans rocket tu peut changer l'affichage du nom mais pas le vrai user name
En: No scape, no special char, and no possibility of change, because in rocket chat app, changing username will pertub links between message... RC is working in a way that you can change your showing name but not your real user name (used like an id)
We got the example of "@nico!"