title: xcode error: "Use of unresolved identifier: GGLContext" (without CocoaPods)
body: <p>I have done web development for a couple years and this is my first project with an iOS application. I have followed all of the instructions from Google's <a href="https://developers.google.com/identity/sign-in/ios/sdk/#old_versions">Get the Google Sign-in SDK for iOS</a> (without CocoaPods), and I tried simulating the application and I'm getting this error: <code>Use of unresolved identifier 'GGLContext'</code></p>
  
  <p>This is the code that is copied from Google's page and put into AppDelegate.swift : </p>
  
  <pre><code>func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -&gt; Bool {
    // Override point for customization after application launch.
    // Initialize Google sign-in
    var configureError: NSError?
    GGLContext.sharedInstance().configureWithError(&amp;configureError)  // THIS LINE HAS THE ERROR
    assert(configureError == nil, "Error configuring Google services: \(configureError)")
  
    //GIDSignIn.sharedInstance().delegate = self
    GIDSignIn.sharedInstance().clientID = MY_CLIENT_ID
  
          return true
      }
  </code></pre>
  
  <p>Any help?</p>