fix

app/Modules/User/Services/QappUserService.php

@@ -200,7 +200,7 @@ class QappUserService
             $tikTokRegisterRequest->mac           = $data['mac'];
             $tikTokRegisterRequest->channel_id    = $channel_id;
             $tikTokRegisterRequest->uid           = $user->id;
-            $tikTokRegisterRequest->register_time = $user->created_at;
+            $tikTokRegisterRequest->register_time = $user->created_at->format('Y-m-d H:i:s');
             $tikTokRegisterRequest->send_order_id = $data['send_order_id'];
             myLog('qapp_register')->info('', compact('tikTokRegisterRequest'));