private function init_api_strings()
 {
     $p = self::API_PREFIX;
     $c = self::CLIENT_ID;
     // not used yet, assuming always vip
     $partner = $this->is_vip() ? "wp-vip" : "wp";
     self::$auth_login_url = $p . 'account/auth/?partner=' . $partner . '&client_id=' . $c . '&scope=' . $p . 'auth.html&response_type=token&redirect_uri=';
     self::$auth_register_url = $p . 'account/authregister/?partner=' . $partner . '&client_id=' . $c . '&scope=' . $p . 'auth.html&response_type=token&redirect_uri=';
     $this->auth_refresh_url = $p . 'oauth/refresh?client_id=' . $c . '&scope=' . $p . 'auth.html&grant_type=refresh_token&redirect_uri=';
     $this->auth_deauth_url = $p . 'oauth/unauthorize?client_id=' . $c . '&scope=' . $p . 'auth.html&redirect_uri=';
     $this->api_client = new MediaPass('', '', self::API_ENV);
 }