I know I am force unwrapping a nil but I dont know how to fix it.

I am just trying to follow a tutorial and can't get help from the author. I am getting this error:

> 
> "Thread 1: Fatal error: Unexpectedly found nil while unwrapping an Optional value" 
> 
> 
> 

```
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "firstcell")
    cell?.textLabel?.text = firstTableArrary[indexPath.row]
    return cell!

```