我无法从我的快照中获取数据以加载到我的tableView单元格中

 ref = Database.database().reference()
 ref.child("Clubs").observe(.value, with: { (snapshot : DataSnapshot) in
        print("clubs: \(snapshot)")

        if let childSnapshot = snapshot.value as? [String : AnyObject] {
        print("myClubs: \(childSnapshot)")
 ref = Database.database().reference()
 ref.chi