code: protected function startSession(Request $request, $sessionId)
      {
          return tap($this->getSession($sessionId), function ($session) use ($request) {
              $session->setRequestOnHandler($request);
              $session->start();
          });
      }
docs: Start the session for the given request.
  
  @param  \Illuminate\Http\Request  $request
  @return \Illuminate\Contracts\Session\Session