Cognito Configuration with the AppDelegate

AppDelegate.swift

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
    // setup logging for AWS & Cognito
    AWSDDLog.sharedInstance.logLevel = .verbose
    AWSDDLog.add(AWSDDTTYLogger.sharedInstance)

    // setup cognito config
    self.cognitoConfig = CognitoConfig()

    // setup cognito
    setupCognitoUserPool()

    return true
}

func setupCognitoUserPool() {
    // we pull the needed values from the CognitoConfig object
    // this just pulls the values in from the plist
    let clientId:String = self.cognitoConfig!.getClientId()
    let poolId:String = self.cognitoConfig!.getPoolId()
    let clientSecret:String = self.cognitoConfig!.getClientSecret()
    let region:AWSRegionType = self.cognitoConfig!.getRegion()

    // we need to let Cognito know which region we plan to connect to
    let serviceConfiguration:AWSServiceConfiguration = AWSServiceConfiguration(region: region, credentialsProvider: nil)
    // we need to pass it the clientId and clientSecret from the app and the poolId for the user pool
    let cognitoConfiguration:AWSCognitoIdentityUserPoolConfiguration = AWSCognitoIdentityUserPoolConfiguration(clientId: clientId, clientSecret: clientSecret, poolId: poolId)
    AWSCognitoIdentityUserPool.register(with: serviceConfiguration, userPoolConfiguration: cognitoConfiguration, forKey: userPoolID)
    let pool:AWSCognitoIdentityUserPool = AppDelegate.defaultUserPool()
    // we need to set the AppDelegate as the user pool's delegate which will get called when events occur
    pool.delegate = self
}