fix: api req method

@@ -10,32 +10,29 @@ class Coupon extends ServiceManager
     /**
      * 验券准备
      *
-     * @param string $encryptedData
-     * @param string $code
+     * @param  string  $encryptedData
+     * @param  string  $code
      *
      * @return mixed
      */
     public function prepare(string $encryptedData = '', string $code = '')
     {
-        return $this->app['client']
-            ->asForm()
-            ->withSession()
+        return $this->app['client']->withSession()
             ->signVia(new LifeSigner())
-            ->post('/goodlife/v1/fulfilment/certificate/prepare/',
+            ->get('/goodlife/v1/fulfilment/certificate/prepare/',
                 ['encrypted_data' => $encryptedData, 'code' => $code]);
     }
 
     /**
      * 验券
      *
-     * @param array $body
+     * @param  array  $body
      *
      * @return mixed
      */
     public function verify(array $body = [])
     {
-        return $this->app['client']
-            ->asForm()
+        return $this->app['client']->asJson()
             ->withSession()
             ->signVia(new LifeSigner())
             ->post('/goodlife/v1/fulfilment/certificate/verify/', $body);
@@ -46,14 +43,13 @@ class Coupon extends ServiceManager
      *
      * @link https://developer.open-douyin.com/docs/resource/zh-CN/dop/develop/openapi/life-service-open-ability/life.capacity/life.capacity.fulfilment/certificate.verify
      *
-     * @param array $body
+     * @param  array  $body
      *
      * @return mixed
      */
     public function cancel(array $body = [])
     {
-        return $this->app['client']
-            ->asForm()
+        return $this->app['client']->asForm()
             ->withSession()
             ->signVia(new LifeSigner())
             ->post('/goodlife/v1/fulfilment/certificate/cancel/', $body);
@@ -62,14 +58,13 @@ class Coupon extends ServiceManager
     /**
      * 券状态查询
      *
-     * @param string $encryptedCode
+     * @param  string  $encryptedCode
      *
      * @return mixed
      */
     public function get(string $encryptedCode)
     {
-        return $this->app['client']
-            ->asForm()
+        return $this->app['client']->asForm()
             ->withSession()
             ->signVia(new LifeSigner())
             ->get('/goodlife/v1/fulfilment/certificate/get/', ['encrypted_code' => $encryptedCode]);
@@ -78,15 +73,14 @@ class Coupon extends ServiceManager
     /**
      * 券状态批量查询
      *
-     * @param string $encryptedCode
-     * @param string $orderId
+     * @param  string  $encryptedCode
+     * @param  string  $orderId
      *
      * @return mixed
      */
     public function query(string $encryptedCode = '', string $orderId = '')
     {
-        return $this->app['client']
-            ->asForm()
+        return $this->app['client']->asForm()
             ->withSession()
             ->signVia(new LifeSigner())
             ->get('/goodlife/v1/fulfilment/certificate/query/',