title: My Firebase Databse gets updated instead of adding new items
body: <p>I am trying to save some data to a firebase Database using this code but everytime I hit button save my data gets updated instead of adding a new item to a dtabase:</p>
  
  <pre><code>    @objc func handleButtonSalvar(){
      guard let title = titleTextfield.text else { return }
      guard let artist = artistTextField.text else { return }
      guard let label = labelTextField.text else { return }
      guard let vinylID = vinylIDTextField.text else { return }
      guard let vinylCountry = vinylCountryTextField.text else { return }
      guard let vinylLocation = vinylLocationTextField.text else { return }
      guard let vinylYear = vinylYearTextField.text else { return }
      let dictionary : [String : Any] = ["title" : title,"artist" : artist,"label" : label,"vinylID" : vinylID,"vinylCountry" : vinylCountry,"vinylLocation" : vinylLocation,"vinylYear" : vinylYear ]
      Database.database().reference().child("vinyls").setValue(dictionary) { (error, ref) in
          if let error = error {
              self.showMessage(alertTitle: "Error Saving to Database", messageToDisplay: "Something happened while saving your data.\(error.localizedDescription)")
              return
          }
  
          self.titleTextfield.text = ""
          self.artistTextField.text = ""
          self.labelTextField.text = ""
          self.vinylIDTextField.text = ""
          self.vinylCountryTextField.text = ""
          self.vinylLocationTextField.text = ""
          self.vinylYearTextField.text = ""
          self.buttonSalvar.isEnabled = false
          self.buttonSalvar.backgroundColor = UIColor(red: 50/255, green: 50/255, blue: 50/255, alpha: 0.4)
          self.showMessage(alertTitle: "Vinyl Saved", messageToDisplay: "Vinyl saved successfully!")
      }
  </code></pre>
  
  <p>what am I doing wrong?</p>
  
  <p>thank you</p>