title: How do I fix Cannot find 'FirebaseApp' in scope?
body: <p>I am having a issue. Please Help. Whenever I try to run this code it has an error and says Cannot find 'FirebaseApp' in scope. Please Help!!!</p>
  <pre><code>import UIKit
  import Firebase
  
  @UIApplicationMain
  class AppDelegate: UIResponder, UIApplicationDelegate {
  
    var window: UIWindow?
  
    func application(_ application: UIApplication,
      didFinishLaunchingWithOptions launchOptions:
        [UIApplicationLaunchOptionsKey: Any]?) -&gt; Bool {
      FirebaseApp.configure()
      return true
    }
  </code></pre>