Example of storing a new book model instance in the Firebase database

StoreNewBook.swift

let db = FIRDatabase.database()
let booksRef = db.reference(withPath: Endpoint.books.path)

var newBook = Book(
    id: nil,
    isbn: "95-0443-843-0",
    title: "Do Androids Dream of Electric Sheep?",
    authors: "Philip K. Dick",
    year: "1968",
    country: "United States",
    createdAt: Date()
)

do {
    try newBook.store(at: booksRef)
} catch ModelError.invalidProperties {
    print("At least one of the properties has an invalid value.")
} catch {
    print("Someting else went wrong.")
}