fixed paddle request form

app/Services/Paddle/PaddleCustomerPortalService.php

@@ -20,6 +20,10 @@ class PaddleCustomerPortalService
             );
         }
 
+        if ($payload === []) {
+            $payload = (object) [];
+        }
+
         return $this->client->post("/customers/{$customerId}/portal-sessions", $payload);
     }
 }

tests/Feature/Api/Tenant/BillingPortalTest.php

@@ -36,7 +36,8 @@ class BillingPortalTest extends TenantTestCase
             $path = parse_url($request->url(), PHP_URL_PATH);
 
             return $request->hasHeader('Paddle-Version', '1')
-                && $path === '/customers/cus_123/portal-sessions';
+                && $path === '/customers/cus_123/portal-sessions'
+                && $request->body() === '{}';
         });
 
         $this->assertDatabaseHas('tenants', [