Add captcha image generation functionality.

app/Http/Controllers/Api/V1/Controller.php

@@ -0,0 +1,12 @@
+<?php declare(strict_types=1);
+
+namespace App\Http\Controllers\Api\V1;
+
+use Illuminate\Foundation\Auth\Access\AuthorizesRequests;
+use Illuminate\Foundation\Validation\ValidatesRequests;
+use Illuminate\Routing\Controller as BaseController;
+
+class Controller extends BaseController
+{
+    use AuthorizesRequests, ValidatesRequests;
+}