How do I access a Twig variable through JavaScript?

I'm creating an autocomplete to use on my system and I'm using Twig ...

My script is very simple and with some searches on the internet, that's what I got to get:

<script type="text/javascript">
    var nomes = {{ usuarios | json_encode | raw }};
        $( "#busca" ).autocomplete({
            minLength: 1,
            source: nomes
        });
</script>