Invalid User Creation Allowed

Run app
Enter invalid email in text field
Enter password in text field
Click sign up button
Allows user to be created and transitions to next view

System:
OSX El Capitan 10.11.3
iPhone 6s Simulator

Normally when using the iPhone camera, you can tap on the screen to tell the camera where it should be focused. Currently, the app doesn't allow for that.

Character Label Doesn't Update On Clear

After signing up for a new account
On the add additional sign up information view controller
When you press the clear button in the text field, the label does not update until typing begins again

System:
iOS 8.4 iPhone 5s

The camera is only successfully displayed after its initial launch
Transitioning back to the master view from other views freeze the camera
Camera is stuck in what looks like a still image mode
Going to the home screen and re-entering the app unfreezes it
Relaunching the app also unfreezes it

System:
iOS 8.4 iPhone 5s

Need to Press Login Twice to Login

Open the app and fill out a valid username and password
Press 'Login' button
Nothing happens, however, if you press login again. You are successfully logged in.
The view is dismissed

System:
iOS 8.4 iPhone 5s
iPhone 6s Simulator

After the user logs in
Transitioning back from the the friends view controller to the master view more than 4 times
App receives memory warning after the second time the segue is performed
App crashes after 4 transitions
Error does not occur while running app inside of simulator

System:
iOS 8.4 iPhone 5s

When testing the app, I clicked the Facebook login button on the login screen. When I was taken to the Facebook page to log in, I saw that I was already authorized. When I click "Cancel", the app crashes.

In the log, I get "fatal error: unexpectedly found nil while unwrapping an Optional value"