Adding a login screen

When you launch the LetsEat app, you'll immediately see the Explore screen. There is no way for the user to sign in. Due to this, you will need to implement a Sign In screen to allow the user to sign in. Initially, this Sign In screen will just display a button to allow the user to sign in in Guest mode, but you will add the Sign in with Apple button later. Follow these steps to do so:

1. Open the LetsEat project and build and run the app to make sure that it's working.
2. Go to Xcode | Preferences | Accounts and make sure that you have entered the Apple ID credentials for a paid Apple Developer account.
3. Click the LetsEat project in the Project navigator and click on Signing and Capabilities. Ensure the Team pop-up menu has been set for a paid Apple Developer account. If you get a Failed to register bundle identifier error, try changing the Bundle Identifier...