TableView crashes while adding new item to Firebase

There are many pages of code for this app, so here is the video I recorded it to show you what is going on. Please take a look and then read my question description:

Here is the situation. I'm trying to add a Data Model to Firebase and it is working just fine. And also when I'm fetching all the data it is still OK. But at the moment when I'm adding data and trying to see it the app crashes and it says that there is a nil value. It is definitely not nil, because I see on the real-time database that the data has been successfully posted to Firebase and everything ok with the references. Here is the source code of UITableView's cellForRowAt method:

UITableView

cellForRowAt

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! TableViewCell
cell.name.text = myArray[indexPath.row].name
cell.date.text = myArray[indexPath.row].date

if myArray[indexPath.row].raiting == 1 {
cell.raiting.image = UIImage(named: "1")
} else if myArray[indexPath.row].raiting == 2 {
cell.raiting.image = UIImage(named: "2")
} else if myArray[indexPath.row].raiting == 3 {
cell.raiting.image = UIImage(named: "3")
} else if myArray[indexPath.row].raiting == 4 {
cell.raiting.image = UIImage(named: "4")
} else if myArray[indexPath.row].raiting == 5 {
cell.raiting.image = UIImage(named: "5")
}



cell.descriptionTitle.text = myArray[indexPath.row].descriptionTitle
cell.descriptionBody.text = myArray[indexPath.row].description

////
let urlOne = URL(string: myArray[indexPath.row].pictureOne!)
let urlTwo = URL(string: myArray[indexPath.row].pictureTwo!)
let urlThree = URL(string: myArray[indexPath.row].pictureThree!)

URLSession.shared.dataTask(with: urlOne!, completionHandler: { (data, response, error) in
if error == nil {



DispatchQueue.main.async(execute: {
cell.pictureOne.image = UIImage(data: data!)
})
}
}).resume()

//
URLSession.shared.dataTask(with: urlTwo!, completionHandler: { (data, response, error) in
if error == nil {



DispatchQueue.main.async(execute: {
cell.pictureTwo.image = UIImage(data: data!)
})
}
}).resume()

//
URLSession.shared.dataTask(with: urlThree!, completionHandler: { (data, response, error) in
if error == nil {



DispatchQueue.main.async(execute: {
cell.pictureThree.image = UIImage(data: data!)
})
}
}).resume()


return cell
}


Here is my fetch method:

func fetchUsers() {


guard let userID = Auth.auth().currentUser?.uid else { return }


Database.database().reference().child("user").child(userID).observe(.childAdded) { (snapshot) in


if snapshot.value != nil {

let result = snapshot.value as! [String : AnyObject]

self.addingMovie = Model()
self.addingMovie.description = result["body"] as? String
self.addingMovie.date = result["date"] as? String
self.addingMovie.pictureOne = result["imageOne"] as? String
self.addingMovie.pictureTwo = result["imageTwo"] as? String
self.addingMovie.pictureThree = result["imageThree"] as? String
self.addingMovie.name = result["name"] as? String
self.addingMovie.raiting = result["raiting"] as? Int
self.addingMovie.descriptionTitle = result["title"] as? String
print("(self.addingMovie.description) - (self.addingMovie.date) - (self.addingMovie.pictureOne) - (self.addingMovie.pictureTwo)")
print("(self.addingMovie.pictureThree) - (self.addingMovie.name) - (self.addingMovie.raiting) - (self.addingMovie.descriptionTitle)")
self.myArray.append(self.addingMovie)

DispatchQueue.main.async(execute: {
self.tableView.reloadData()
})
}



}
}


Here is my database structure

When I'm launching the app table view successfully fetches all the data

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