How to send a SMS from Total.js?

nexmo-key     : YOUR KEY
nexmo-secret  : YOUR SECRET
nexmo-sender  : Total.js

F.sms = function(number, message, callback) {
    RESTBuilder.make(function(builder) {
        builder.url('https://rest.nexmo.com/sms/json?api_key={0}&api_secret={1}&from={2}&to={3}&text={4}&type=unicode'.format(F.config['nexmo-key'], F.config['nexmo-secret'], encodeURIComponent(F.config['nexmo-sender']), number, encodeURIComponent(message)));
        builder.exec(function(err, response) {
            LOGGER('sms', 'response:', JSON.stringify(response), 'error:', err);
            callback && callback(err, response['message-count'] > 0);
        });
    });
    return F;
};

F.sms('+421903163302', 'Hello Peter from Total.js');

// or

F.sms('+421903163302', 'Hello Peter from Total.js', (err, sent) => console.log(err, sent));