update controllers logic

app/Http/Requests/Parents/UpdateAuthorizedUserRequest.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace App\Http\Requests\Parents;
+
+use Illuminate\Foundation\Http\FormRequest;
+
+class UpdateAuthorizedUserRequest extends FormRequest
+{
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    protected function prepareForValidation(): void
+    {
+        if ($this->has('email') && $this->input('email') === '') {
+            $this->merge(['email' => null]);
+        }
+    }
+
+    /**
+     * @return array<string, mixed>
+     */
+    public function rules(): array
+    {
+        return [
+            'email' => ['sometimes', 'nullable', 'string', 'email'],
+        ];
+    }
+}