protected String getAuthDialogWait() {
        return res.getString(R.string.auth_dialog_waiting, getAuthTitle());
    }
Allows deriving classes to check the response for error messages specific to their Token implementation

@param response The error response of the token request
@return String with a more detailed error message (user-facing, localized), can be empty
main/src/main/java/cgeo/geocaching/activity/TokenAuthorizationActivity.java