Throw an InvalidArgumentException when missing the array key

Enforces the new state. Consider adding a BadConfigurationException?

Author: emmadesilva

packages/framework/src/Foundation/Concerns/HasKernelData.php

@@ -5,6 +5,7 @@
 namespace Hyde\Foundation\Concerns;
 
 use Hyde\Facades\Config;
+use InvalidArgumentException;
 use Illuminate\Support\Collection;
 use Hyde\Framework\Features\Blogging\Models\PostAuthor;
 
@@ -50,6 +51,10 @@ public function authors(): Collection
     protected function parseConfigurationAuthors(Collection $authors): Collection
     {
         return $authors->mapWithKeys(function (PostAuthor $author, string $username): array {
+            if (! $username) {
+                throw new InvalidArgumentException('Author username cannot be empty. Did you forget to set the author\'s array key?');
+            }
+
             return [$username => tap($author, fn (PostAuthor $author) => $author->username = $username)];
         });
     }