Only show create subject button if logged in

resources/views/subject/index.blade.php

@@ -5,9 +5,12 @@
         </h2>
     </x-slot>
 
+    {{-- Auth::user() is NULL if not logged in --}}
+    @if (Auth::user())
     <a href="{{ route('subject.create') }}" class="bg-green-500 text-white p-1 inline-block">New subject</a>
 
     <br>
+    @endif
 
     @foreach ($subjects as $subject)
         <a href="{{ route('subject.show', $subject) }}" class="text-blue-500 hover:underline">{{ $subject->created_at }} {{ $subject->name }}</a>