array_forin.swift

let admins = [User(name: "Admin")]
// [{name "Admin"}]
let guests = [User(name: "Guest")]
// [{name "Guest"}]

var allUsers = admins + guests
// [{name "Admin"}, {name "Guest"}]

// TODO: - Iterate over the entire collection with the for-in loop:
for user in allUsers {
    print("User: \(user)")
    /*
     User: User(name: "Admin")
     User: User(name: "Guest")
     */
}