Refactor AutoLayout code of custom views.
Created class to create NSErrors for SDK.
Show client side login errors.
SignUp client errors & validation.
Recover password errors.
Refactor Validation & Keyboard handling.
Handle & show API errors.
Add activity indicator to UIButton.
Show social buttons if configured in Auth0 app.
Add Facebook SDK as dependency.
Obtain FB access token using SDK.
Extract business logic from custom UIView.
Perform auth with API using FB token.