class AuthTokenManager implements TokenManager {

    private void refreshToken() {
        MultivaluedMap<String, String> mvm = new CaseInsensitiveMap<String>();
        mvm.putSingle(OAuth2Constants.GRANT_TYPE,
                      "refresh_token");
        mvm.putSingle("refresh_token",
                      accessTokenResponse.getRefreshToken());
        consumeGrantTokenService(mvm);
    }

    public  AuthTokenManager(AuthSettings config);

}