title: Unrecognized Selector sent to Instance Firebase auth
body: <p>Setting up firebase auth and the app keeps crashing once the Sign Up button is tapped, I have the button linked to @IBAction for firebase signup and all classes are correct for each view controller (login and signup), I also have the correct @IBOutlets for the text fields.</p>
  
  <pre><code>2019-03-03 18:50:06.225729+0000 Spring[40363:3684981] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[Spring.registerView loginViewControllerButton:]: unrecognized selector sent to instance 0x7f7f39407ec0'
  </code></pre>