fix: paymentUrls is null (#1786)

* fix: paymentUrls is null

* feat: potential secure storage error

lib/cake_pay/cake_pay_order.dart

@@ -1,4 +1,3 @@
-
 class CakePayOrder {
   final String orderId;
   final List<OrderCard> cards;

lib/cake_pay/cake_pay_service.dart

@@ -82,10 +82,12 @@ class CakePayService {
   }
 
   /// Logout
-  Future<void> logout(String email) async {
+  Future<void> logout([String? email]) async {
     await secureStorage.delete(key: cakePayUsernameStorageKey);
     await secureStorage.delete(key: cakePayUserTokenKey);
-    await cakePayApi.logoutUser(email: email, apiKey: cakePayApiKey);
+    if (email != null) {
+      await cakePayApi.logoutUser(email: email, apiKey: cakePayApiKey);
+    }
   }
 
   /// Purchase Gift Card

lib/src/screens/cake_pay/cards/cake_pay_confirm_purchase_card_page.dart

@@ -258,7 +258,11 @@ class CakePayBuyCardDetailPage extends BasePage {
     if (!isLogged) {
       Navigator.of(context).pushNamed(Routes.cakePayWelcomePage);
     } else {
-      await cakePayPurchaseViewModel.createOrder();
+      try {
+        await cakePayPurchaseViewModel.createOrder();
+      } catch (_) {
+        await cakePayPurchaseViewModel.cakePayService.logout();
+      }
     }
   }