add family logic

app/Http/Requests/Families/GuardiansByFamilyRequest.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace App\Http\Requests\Families;
+
+use App\Http\Requests\ApiFormRequest;
+
+class GuardiansByFamilyRequest extends ApiFormRequest
+{
+    protected function prepareForValidation(): void
+    {
+        parent::prepareForValidation();
+        $this->merge(['family_id' => $this->route('familyId')]);
+    }
+
+    public function authorize(): bool
+    {
+        return auth()->check();
+    }
+
+    public function rules(): array
+    {
+        return [
+            'family_id' => ['required', 'integer', 'min:1'],
+        ];
+    }
+}