This lesson will cover the fun data fetching portion of our course. Now that we have our users stored inside of Firestore, we can make a very easy call to fetch this data and transform it into an actual User. Let's go ahead and complete this process by introducing a custom initializer for our User such that it can take in a document dictionary. We'll also have to be very careful of how properties are set up if they don't currently exist inside of Firestore.