fix: api req method

@@ -17,11 +17,9 @@ class Coupon extends ServiceManager
      */
      */
     public function prepare(string $encryptedData = '', string $code = '')
     public function prepare(string $encryptedData = '', string $code = '')
     {
     {
-        return $this->app['client']
-            ->asForm()
-            ->withSession()
+        return $this->app['client']->withSession()
             ->signVia(new LifeSigner())
             ->signVia(new LifeSigner())
-            ->post('/goodlife/v1/fulfilment/certificate/prepare/',
+            ->get('/goodlife/v1/fulfilment/certificate/prepare/',
                 ['encrypted_data' => $encryptedData, 'code' => $code]);
                 ['encrypted_data' => $encryptedData, 'code' => $code]);
     }
     }
 
 
@@ -34,8 +32,7 @@ class Coupon extends ServiceManager
      */
      */
     public function verify(array $body = [])
     public function verify(array $body = [])
     {
     {
-        return $this->app['client']
-            ->asForm()
+        return $this->app['client']->asJson()
             ->withSession()
             ->withSession()
             ->signVia(new LifeSigner())
             ->signVia(new LifeSigner())
             ->post('/goodlife/v1/fulfilment/certificate/verify/', $body);
             ->post('/goodlife/v1/fulfilment/certificate/verify/', $body);
@@ -52,8 +49,7 @@ class Coupon extends ServiceManager
      */
      */
     public function cancel(array $body = [])
     public function cancel(array $body = [])
     {
     {
-        return $this->app['client']
-            ->asForm()
+        return $this->app['client']->asForm()
             ->withSession()
             ->withSession()
             ->signVia(new LifeSigner())
             ->signVia(new LifeSigner())
             ->post('/goodlife/v1/fulfilment/certificate/cancel/', $body);
             ->post('/goodlife/v1/fulfilment/certificate/cancel/', $body);
@@ -68,8 +64,7 @@ class Coupon extends ServiceManager
      */
      */
     public function get(string $encryptedCode)
     public function get(string $encryptedCode)
     {
     {
-        return $this->app['client']
-            ->asForm()
+        return $this->app['client']->asForm()
             ->withSession()
             ->withSession()
             ->signVia(new LifeSigner())
             ->signVia(new LifeSigner())
             ->get('/goodlife/v1/fulfilment/certificate/get/', ['encrypted_code' => $encryptedCode]);
             ->get('/goodlife/v1/fulfilment/certificate/get/', ['encrypted_code' => $encryptedCode]);
@@ -85,8 +80,7 @@ class Coupon extends ServiceManager
      */
      */
     public function query(string $encryptedCode = '', string $orderId = '')
     public function query(string $encryptedCode = '', string $orderId = '')
     {
     {
-        return $this->app['client']
-            ->asForm()
+        return $this->app['client']->asForm()
             ->withSession()
             ->withSession()
             ->signVia(new LifeSigner())
             ->signVia(new LifeSigner())
             ->get('/goodlife/v1/fulfilment/certificate/query/',
             ->get('/goodlife/v1/fulfilment/certificate/query/',