title: Notification send to a separate admin table in Laravel Notification
body: <p>I separate admin table as well as guard, I'm working on sending notification when new user registered. Throughout searching I mostly get something like this:</p>
  <pre><code>$admins = User::whereHas('roles', function ($query) {
       $query-&gt;where('id', 1);
      })-&gt;get();
  Notification::send($admins, new NewUserNotification($event-&gt;user));
  </code></pre>
  <p>In my case, I didn't add an admin role just like others. I wanted to send notifications to the admin table(only 1 admin and fixed) and I tried the code below but it didn't work. I just can't figure out what's wrong and how should I do it?</p>
  <pre><code>$admins = Admin::first();
  
  Notification::send($admins, new NewUserNotification($event-&gt;user));
  </code></pre>