Added placeholder users; Better exception handling; Enhanced local setup

app/Exceptions/Api/ApiException.php

@@ -0,0 +1,46 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Exceptions\Api;
+
+use Exception;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
+use LogicException;
+
+abstract class ApiException extends Exception
+{
+    /**
+     * Render the exception into an HTTP response.
+     */
+    public function render(Request $request): JsonResponse
+    {
+        return response()
+            ->json([
+                'error' => true,
+                'key' => $this->getKey(),
+                'message' => $this->getTranslatedMessage(),
+            ], 400);
+    }
+
+    /**
+     * Get the key for the exception.
+     */
+    public function getKey(): string
+    {
+        if (defined(static::class.'::KEY')) {
+            return static::KEY;
+        }
+
+        throw new LogicException('API exceptions need the KEY constant defined.');
+    }
+
+    /**
+     * Get the translated message for the exception.
+     */
+    public function getTranslatedMessage(): string
+    {
+        return __('exceptions.api.'.$this->getKey());
+    }
+}