StoreCenter exposes the lastSyncDate for debug purposes

LeStorage/StoreCenter.swift

@@ -110,6 +110,9 @@ public class StoreCenter {
     public var apiURL: String? {
         return self._urlManager?.api
     }
+    public var lastSyncDate: String {
+        return self._settingsStorage.item.lastSynchronization
+    }
     
     /// Returns the service instance
     public func service() throws -> Services {