title: insert data with many to many relation in Laravel Eloquent
body: <p>I have created Many To Many relationships on both levels (database and Models) for (User) and (Role) Models, now how can I assign many roles to the user id = 2 for instance: like below?</p>
  <pre><code>       $user = User::find(2);
         ????
          return view('index', compact(''));
  </code></pre>