diff --git a/app/Endpoint/Api/Http/Controllers/Auth/MiniprogramController.php b/app/Endpoint/Api/Http/Controllers/Auth/MiniprogramController.php
index 92fe52ce..45bbf739 100644
--- a/app/Endpoint/Api/Http/Controllers/Auth/MiniprogramController.php
+++ b/app/Endpoint/Api/Http/Controllers/Auth/MiniprogramController.php
@@ -37,7 +37,11 @@ class MiniprogramController extends Controller
         }
         $time = now();
         $ip = $request->realIp();
-        $inviter = $this->findUserByCode($request->input('invite_code', ''));
+
+        $inviter = null;
+        if ($request->filled('invite_code')) {
+            $inviter = $this->findUserByCode($request->input('invite_code', ''));
+        }
 
         try {
             DB::beginTransaction();
@@ -65,7 +69,7 @@ class MiniprogramController extends Controller
             $token = $user->createToken($type);
 
             DB::commit();
-    
+
             return response()->json([
                 'token' => $token->plainTextToken
             ]);
@@ -120,7 +124,7 @@ class MiniprogramController extends Controller
             $token = $user->createToken(SocialiteType::WechatMiniProgram->value);
 
             DB::commit();
-    
+
             return response()->json([
                 'token' => $token->plainTextToken
             ]);