function registerUserPublicKey() {
    var user = {
        email: 'hamdi@1vu.fr',
        password: '123456Toto'
    };
    var client = storj.BridgeClient(api, {
            basicauth: user
        });
    // Generate KeyPair
    var keypair = storj.KeyPair();
    console.log(keypair);
    // Load keypair from your saved private key
    //var keypair = storj.KeyPair(fs.readFileSync('c:/temp/privatekey').toString());
    // Login using the keypair generated
    var client = storj.BridgeClient(api, {
            keyPair: keypair
        });
    fs.writeFileSync('c:/temp/privatekey', keypair.getPrivateKey());
    // Add the keypair public key to the user account for authentication
    client.addPublicKey(keypair.getPublicKey(), function (err) {
        console.log(keypair.getPublicKey());
        if (err) {
            // Handle error on failure.
            return console.log('error', err.message);
        }
        // Save the private key for using to login later.
        // You should probably encrypt this
        fs.writeFileSync('c:/temp/privatekey', keypair.getPrivateKey());
        console.log("User " + user + " registred successfully");
    });
}