add new unique email validator

api/app/GraphQL/Validators/UpdateUserInputValidator.php

@@ -0,0 +1,38 @@
+<?php
+
+namespace App\GraphQL\Validators;
+
+use Illuminate\Support\Facades\Log;
+use Illuminate\Validation\Rule;
+use Nuwave\Lighthouse\Validation\Validator;
+
+final class UpdateUserInputValidator extends Validator
+{
+    /**
+     * Return the validation rules.
+     *
+     * @return array<string, array<mixed>>
+     */
+    public function rules(): array
+    {
+
+        Log::debug($this->args->toArray());
+
+        return [
+            'email' => [
+                'sometimes',
+                Rule::unique('users', 'email')->ignore($this->arg('id'), 'id'),
+            ]
+        ];
+    }
+
+    /**
+     * Return the validation messages
+     */
+    public function messages(): array
+    {
+        return [
+            'email.unique' => 'This email address is already in use',
+        ];
+    }
+}