When I try to run the code. my tableview does not show data. I think this is because the method cellforRowat indexpath does not get called. but I am not sure why is is not getting called.    override func viewDidLoad() {     super.viewDidLoad()     getApiData()     leaderBoardTableView.delegate = self     leaderBoardTableView.dataSource = self          print(currentUser.userName)          self.tableView.backgroundColor = UIColor.black;         }   override func numberOfSections(in tableView: UITableView) -> Int {     number of sections     return 1   }   override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {     print("numofRoesInsec called")         return self.numRows   }   override func tableView(_ tableView: UITableView,               titleForHeaderInSection section: Int) -> String {     return "Leaderboard"   }       override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {     print("table view loading")     let cell = tableView.dequeueReusableCell(withIdentifier: "LeaderboardTableViewCell", for: indexPath) as! LeaderboardTableViewCell         cell.backgroundColor = UIColor.black     cell.name.textColor = UIColor.white     cell.rank.textColor = UIColor.white     cell.score.textColor = UIColor.white     cell.name.text = "\(self.data[indexPath.row]["username"])"     cell.score.text = "\(self.data[indexPath.row]["score"])"     cell.rank.text = "\(self.data[indexPath.row]["rank"])"     cell.name.textAlignment = .justified     cell.rank.textAlignment = .justified     cell.score.textAlignment = .justified           return cell   }