if condition with auth() in laravel blade doesn't work

I have an is_admin column in laravel users table and want to check if user is admin or not. See below code.

@if ( == true)
    <li class="nav-item">
       <a class="nav-link" href=""></a>
    </li>
@endif

This error is coming up : syntax error, unexpected '<' (View: C:\2020\lv02\lv02\resources\views\layouts\app.blade.php)

Please help.