docs: function pxCookieFactory(ctx, config) {
      if (ctx.cookieOrigin === 'cookie') {
          return (ctx.cookies['_px3'] ? new CookieV3(ctx, config, config.logger) : new CookieV1(ctx, config, config.logger));
      } else {
          return (ctx.cookies['_px3'] ? new TokenV3(ctx, config, ctx.cookies['_px3'], config.logger) : new TokenV1(ctx, config, ctx.cookies['_px'], config.logger));
      }
  }