title: Swift/Firebase Database invalid token error
body: <p>Experiencing some rather odd issues with Firebase.. I have installed firebase through cocoaPods, included the GoogleService-Info.plist, etc - but when I try to read a value from Firebase, I get this error:</p>
  
  <blockquote>
    <p>2016-06-16 12:10:04.598 MP[78421:13128189] [FirebaseDatabase] Authentication failed: invalid_token (Invalid claim 'aud' in auth token.)</p>
  </blockquote>
  
  <p>I have gotten this every single time I have tried to start a new project, except from one time - but I have abandoned that project now, as I am starting a new one. Here is the simple code:</p>
  
  <pre><code>import UIKit
  import Firebase
  import FirebaseDatabase
  class ViewController: UIViewController {
      var ref:FIRDatabaseReference!
      override func viewDidLoad() {
          super.viewDidLoad()
          ref = FIRDatabase.database().reference()
          ref.observeSingleEventOfType(.Value) { (snapshot:FIRDataSnapshot) in
              var val = snapshot.value! as? String
              print(val)
          }
      }
  }
  </code></pre>
  
  <p>How can I fix this?</p>