* @param clientSecret Client Secret for the application to authenticate against an OAuth2 end-point.
* @param friendlyName a name identifying the owner of the credentials, such as 'James'.
* @param refreshToken a refresh token that was obtained previously.
*/
public OAuth2Credentials(String clientId, String clientSecret, String friendlyName, String refreshToken) {
this(new OAuthUtils(OAuthUtils.OAuthImplementation.GOOGLE_STORAGE_OAUTH2_10, clientId, clientSecret),
friendlyName, refreshToken);
}