SMS for Auth0 MFA

            const RingCentral = require('@ringcentral/sdk').SDK;

exports.onExecuteSendPhoneMessage = async (event, api) => {
    // Setup Connection
    var e = event;
    var rcsdk = new RingCentral({
        'server':       e.secrets.RINGCENTRAL_SERVER,
        'clientId':     e.secrets.RINGCENTRAL_CLIENT_ID,
        'clientSecret': e.secrets.RINGCENTRAL_CLIENT_SECRET,
    });

    // Setup User Auth
    var platform = rcsdk.platform();
    platform.login({
        'jwt': e.secrets.RINGCENTRAL_JWT
    });

    // Send MFA upon login success
    platform.on(platform.events.loginSuccess, function(err){
        async function send_sms() {
            try {
                // Clean numbers (to make sure proper format)
                var cleanToNumber = e.message_options.recipient.replace(/[^+0-9]/, '');
                if (cleanToNumber.substring(0,1) != '+') { cleanToNumber = '+'+cleanToNumber; }
                var cleanFromNumber = e.secrets.RINGCENTRAL_FROM_NUMBER.replace(/[^+0-9]/, '');
                if (cleanFromNumber.substring(0,1) != '+') { cleanToNumber = '+'+cleanToNumber; }

                // Send SMS
                var resp = await platform.post('/restapi/v1.0/account/~/extension/~/sms', {
                    from: {'phoneNumber': cleanFromNumber},
                    to: [{'phoneNumber': cleanToNumber}],
                    text: e.message_options.text
                })
                return cb(null, {});
            } catch (err) {
                return cb(new Error(err.message));
            }
        }
        send_sms();
    });
}