title: Use of unresolved identifier 'Auth' and No such module 'FirebaseAuth' errors
body: <p>With just "import Firebase", when trying to use Auth.auth(), I get an "unresolved identifier "Auth" error. When I try adding the "Import FirebaseAuth", I get a "No such module "FirebaseAuth" error.</p>
  
  <p>My Podfile includes "Firebase/Core", "Firebase/Auth", and "Firebase/Database". I've tried adding every import and pod that people have recommended. </p>
  
  <pre><code>import Firebase
  import FirebaseAuth
  //import FirebaseDatabase
  
  class ViewController: UIViewController {
  
      @IBOutlet weak var name: UITextField!
      @IBOutlet weak var pin: UITextField!
  
      @IBOutlet weak var loginButton: UIButton!
  
      @IBAction func buttonRegister(sender: UIButton) {
          let loginName = name.text
          let loginPin = pin.text
  
          Auth.auth().createUser(name: name!, pin: pin!, completion: { (user: FIRUser?, error) in
              if error == nil {
                  //reg success
              } else {
                  //reg fail
              }
          })
      }//end button reg
  </code></pre>
  
  <p>My Podfile is currently:</p>
  
  <pre><code># Uncomment the next line to define a global platform for your project
  platform :ios, '9.0'
  
  target 'dyeStats' do
    # Comment the next line if you don't want to use dynamic frameworks
    use_frameworks!
  
    # Pods for dyeStats
  pod 'Firebase/Core'
  pod 'Firebase/Auth'
  pod 'Firebase/Database'
  
  
  end
  
  </code></pre>