add screen to view a barcode isolated

src/services.rs

@@ -648,6 +648,13 @@ impl RewardsCardService {
             .await
     }
 
+    pub async fn get_card(&self, user_id: i64, card_id: i64) -> DomainResult<Option<RewardsCard>> {
+        let cards = Arc::clone(&self.cards);
+        self.db
+            .run(move |txn| Box::pin(async move { cards.get_card(txn, user_id, card_id).await }))
+            .await
+    }
+
     pub async fn create_card(
         &self,
         user_id: i64,