Join Many to many table in Laravel

I have two many to many table

1. Users(id, name,email)
2. reqs(req_id,quantity_req,status)
3. req_user(id, req_id,user_id) Is it possible to join those table so as to retrieve data

     $u_id = $request->user_name;
 $start_date = $request->get('start_date');
$end_date = $request->get('end_date');
      $req = DB::table('reqs')
            ->join('req_user', 'reqs.req_id', "=", 'req_user.req_id')
 ->whereBetween('date_applied', [$start_date, $end_date])
            ->where('user_id', $u_id)
            ->pluck('req_id');

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