调整代码

app/api/controller/Passport.php

@@ -16,7 +16,7 @@ class Passport extends ApiController{
     public function login():Json
     {
         if (!$this->request->isPost()) {
-            return $this->renderError('请求方式错误');
+            return $this->renderError('不支持GET请求');
         }
         $data = $this->postData();
         $model = new UserService;

app/api/service/UserService.php

@@ -2,7 +2,6 @@
 namespace app\api\service;
 
 use app\api\model\User;
-use think\Db;
 /**
  * 用户表
  */