@app.route('/oauth2/callback')
def callback():
    error = request.args.get('error', '')
    if error:
        return "Error: " + error

    authorization_code = request.args.get('code')

    data = {'grant_type': 'authorization_code',
            'code': authorization_code, 'redirect_uri': callback_uri}
    id_token_response = requests.post(
        token_url, data=data, verify=False,

        return new AuthorizationCodeTokenRequest(httpTransport, jsonFactory, new GenericUrl(getOicTokenServerUrl()), code)//
                .setGrantType("authorization_code")//
                .setRedirectUri(getOicRedirectUrl())//
                .set("client_id", getOicClientId())//
                .set("client_secret", getOicClientSecret())//
                .execute();
    }

  * kubeadm: Support for `.AuthorizationModes` in the kubeadm v1alpha2 API has been removed. Instead, you can use the `.APIServerExtraArgs` and `.APIServerExtraVolumes` fields to achieve the same effect. Files using the v1alpha1 API and setting this field will be automatically upgraded...

* `hack/local-up-cluster.sh` now enables the Node authorizer by default. Authorization modes can be overridden with the `AUTHORIZATION_MODE` environment variable, and the `ENABLE_RBAC` environment variable is no longer used. ([#49812](https://github.com/kubernetes/kubernetes/pull/49812), [@liggitt](https://github.com/liggitt))