stella multi sig setup

app.get('/mssetup', (request, response) => {

    var bobPair = StellarSdk.Keypair.fromSecret("SAN5EIFHBYNOGYNNQWI27DRQ67HHOLEMBM4V3IGSOX2QNNW2O3RBA27Y");
    var alicePair = StellarSdk.Keypair.fromSecret("SDLNYNCBBS5NBGQTWWQR7CMUUADA4NGBUY6WU3TOEKVWET5VGOEKFD4K");
    //
    var fromPair = StellarSdk.Keypair.fromSecret("SACBACXALCZNQJJJ3AW5NGEAQYJHPDRSOLF4HNNSSQ3GMW2GPSEJLTWU");

    server.loadAccount(fromPair.publicKey()).then((account) => {

        var transaction = new StellarSdk.TransactionBuilder(account)
            .addOperation(StellarSdk.Operation.setOptions({
                setFlags: 1,
                signer: {
                    ed25519PublicKey: bobPair.publicKey(),
                    weight: 1
                },
                signer: {
                    ed25519PublicKey: alicePair.publicKey(),
                    weight: 1
                },
                masterWeight: 0, // set master key weight
                lowThreshold: 1,
                medThreshold: 1, // a payment is medium threshold
                highThreshold: 1 // make sure to have enough weight to add up to the high threshold!
            }))
            .build();

        transaction.sign(fromPair);

        server.submitTransaction(transaction)
            .then(() => {
                response.send('worked!')
            })
            .catch((err) => {
                console.log(err.response.data.extras.result_codes);
                response.send('An error ocurred!')
            });

    }).catch((err) => {
        console.log(err.response.data.extras.result_codes);
        response.send('An error ocurred2!')
    });
});