I'd like to create the initial data with Realm, but I don't know how to do it.

import UIKit
import RealmSwift

@UIAapplicationMain
classAppDelegate:UIResponder,UIApplicationDelegate{

    var window —UIWindow?
    let defaults = NSUserDefaults()

    func application(application:UIApplication, didFinishLaunchingWithOptions launchOptions:[NSObject:AnyObject]?) ->Bool{

        // initial boot process
        letdic = ["initialLaunch": true ]
        defaults.registerDefaults(dic)
        defaults.synchronize()

        if defaults.boolForKey("initialLaunch") == true {
            print("initial setup start")
            self.initialSetUp()
        }

        return true
    }

    func initialSetUp(){
        // initial migration
        self.realmMigration()
        // seed data input
        self.insertSeedData()
        // flag as first-time-launched
        self.defaults.setBool(false, forKey: "initialLaunch")
        self.defaults.synchronize()
    }

    US>funcrealmMigration(){
        let config = Realm.Configuration(
            // Configures a new schema version.Must be greater than the previous version.
            // (If you have never configured a schema version, 0 is initially configured.)
            schemaVersion: 1,

            // Describes the migration process.Attempting to open an older schema version of Realm
            // The migration runs automatically.
            migrationBlock: {migration, oldSchemaVersion in
                if(oldSchemaVersion<1){
                    // You don't have to do anything!
                    // Realm automatically recognizes newly added and deleted properties.
                    // It then automatically updates the schema on the disk.
                }
        })

        // Apply the new configuration to the default Realm.
        Realm.Configuration.defaultConfiguration=config

        // If the schema version is different when you try to open the Realm file,
        // The migration will occur automatically.
        let realm=try!Realm()
    }

    func insertSeedData(){
        // realm
        let realm=try!Realm()
        // Create an empty app user
        letappUser=User()
        appUser.id = 1
        // write processing
        try!realm.write{
            realm.add (appUser, update:true)
        }
    }
}