改进 EMQX 支持

app/Http/Controllers/Admin/DeviceController.php

@@ -11,8 +11,6 @@
 
 class DeviceController extends Controller
 {
-    //
-
     public function index(Request $request): RedirectResponse|View
     {
         $emqx = new EmqxSupport();

app/Support/EmqxSupport.php

@@ -64,7 +64,7 @@ public function clients($params = [])
             $response = $this->api()->get('clients', $params);
         } /** @noinspection PhpRedundantCatchClauseInspection */ catch (ConnectionException $e) {
             Log::error('emqx connect failed.', [$e]);
-            throw new EmqxSupportException('EMQX API 无法连接。');
+            throw new EmqxSupportException('EMQX API 无法连接。' . $e->getMessage());
         }
 
         if ($response->successful()) {