Estou usando o código a seguir para receber e-mail e nome do usuário do facebook

protected void onCreate(Bundle savedInstanceState) {

    //Display page
    setContentView(R.layout.activity_main);
    AppEventsLogger.activateApp(MainActivity.this);

    FBloginButton = (Button) findViewById(R.id.fb_login_button);
    callbackManager = CallbackManager.Factory.create();

    FBloginButton.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
        //Login the user through facebook when button is clicked
            onFblogin();
        }
    });

}

private void onFblogin() {
    callbackManager = CallbackManager.Factory.create();

    // Set permissions
    LoginManager.getInstance().logInWithReadPermissions(this, Arrays.asList("email", "user_friends", "public_profile"));

    //Try logging in the user
    LoginManager.getInstance().registerCallback(callbackManager, new FacebookCallback<LoginResult>() {

        @Override
        public void onSuccess(LoginResult loginResult) {

            GraphRequest request = GraphRequest.newMeRequest(loginResult.getAccessToken(), new GraphRequest.GraphJSONObjectCallback() {

                @Override
                public void onCompleted(JSONObject object, GraphResponse response) {
                    Log.i("LoginActivity", response.toString());

                    // Get facebook data from login
                    try {
                        email = object.getString("email");
                    } catch (JSONException e) {
                        e.printStackTrace();
                    }

                    try {
                        name = object.getString("name");

                    } catch (JSONException e) {
                        e.printStackTrace();
                    }
                    //new fbLogin().execute();

                }
            });

            Bundle parameters = new Bundle();
            parameters.putString("fields", "email, name");
            request.setParameters(parameters);
            request.executeAsync();

        }

        @Override
        public void onCancel() {
        }

        @Override
        public void onError(FacebookException error) {

        }
    });
}

No entanto, isso retorna apenas o nome e não o email do usuário. Como posso obter os dois?