Is @all or @user not supported?

[lcherone]

Im trying to notify room users using @ALL but when the message is posted its not being parsed by hipchat, its just showing as a string.

<?php 
$hipChatMsg = [
    'color' => 'red',
    'notify' => true,
    'message' => '@all hello world',
];

$roomAPI->sendRoomNotification('Alerts', new Message($hipChatMsg));