Improved api validation

app/Http/Controllers/Api/SubscriberController.php

@@ -14,8 +14,8 @@ namespace CachetHQ\Cachet\Http\Controllers\Api;
 use CachetHQ\Cachet\Commands\Subscriber\SubscribeSubscriberCommand;
 use CachetHQ\Cachet\Commands\Subscriber\UnsubscribeSubscriberCommand;
 use CachetHQ\Cachet\Models\Subscriber;
-use Exception;
 use GrahamCampbell\Binput\Facades\Binput;
+use Illuminate\Database\QueryException;
 use Illuminate\Foundation\Bus\DispatchesJobs;
 use Illuminate\Http\Request;
 use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;
@@ -47,7 +47,7 @@ class SubscriberController extends AbstractApiController
     {
         try {
             $subscriber = $this->dispatch(new SubscribeSubscriberCommand(Binput::get('email'), Binput::get('verify', false)));
-        } catch (Exception $e) {
+        } catch (QueryException $e) {
             throw new BadRequestHttpException();
         }