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app/Http/Controllers/api/Fingerprint.php

@@ -20,8 +20,8 @@ class Fingerprint extends BaseController
     {
         try {
             $params = request()->validate([
-                'member_id' => ['required', 'string'],
-                'visitor_id' => ['required', 'string'],
+                'member_id' => ['required', 'string', 'min:1'],
+                'visitor_id' => ['required', 'string', 'min:1', 'max:32'],
             ]);
             PublicService:: setVisitorId($params['member_id'], $params['visitor_id']);
         } catch (ValidationException $e) {