fix: Add locker_id in merchant account and sbx default locker (#276)

Co-authored-by: Arun Raj M <jarnura47@gmail.com>

crates/router/src/services/api.rs

@@ -562,6 +562,7 @@ pub async fn authenticate_merchant<'a>(
                 redirect_to_merchant_with_http_post: false,
                 publishable_key: None,
                 storage_scheme: enums::MerchantStorageScheme::PostgresOnly,
+                locker_id: None,
             })
         }