tableView doesn't show data in swift - swift

Question

I'm trying to create a tableView within a viewController. I know it is annoying, but the table looks much better that way. I am also trying to incorporate data from Firebase to put into the table. Unfortunately when I run the code, it only shows a blank table. The console was able to print the desired data, but it just won't show on the actual table. Please let me know what I'm doing wrong. Many thanks!
class ViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
#IBOutlet weak var tableView: UITableView!
var user = Auth.auth().currentUser
var users = [Users]()
override func viewDidLoad() {
super.viewDidLoad()
tableView.dataSource = self
tableView.delegate = self
self.tableView.register(UITableViewCell.self, forCellReuseIdentifier: "cell")
tableView.reloadData()
fetchUser()
}
func fetchUser() {
Database.database().reference(fromURL: "https://yala-2018.firebaseio.com/").child("users").observe(.childAdded, with: { (DataSnapshot) in
if let dictionary = DataSnapshot.value as? [String: AnyObject] {
let user = Users()
// user.setValuesForKeys(dictionary)
user.name = dictionary["name"] as! String
user.age = dictionary["age"] as! String
user.sex = dictionary["sex"] as! String
self.users.append(user)
print(user.name, user.age)
DispatchQueue.main.async(execute: {
self.tableView.reloadData()
})
}
})
}
func numberOfSections(in tableView: UITableView) -> Int {
// #warning Incomplete implementation, return the number of sections
return 0
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// #warning Incomplete implementation, return the number of rows
return users.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "guide", for: indexPath)
let user = users[indexPath.row]
cell.textLabel?.text = user.name
cell.detailTextLabel?.text = "Age: \(user.age) Sex: \(user.sex)"
// Configure the cell...
return cell
}
func tableView(tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
}
}

Answer 1

Change this to 1 as by 0 you mean no sections which will display empty tableView even if there is a data , or remove it as by default it's 1
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}