ios - AWS Cognito UserPool 自定义登录保护 AppClientSecret

Question

我已经看到了链接（比如这个：https ://aws.amazon.com/blogs/mobile/how-amazon-cognito-keeps-mobile-app-users-data-safe/）说不存储 AppClientSecret 在移动应用程序，但是如何在不将 AppClientSecret 存储在应用程序中的情况下实现自定义登录？

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {

    let serviceConfiguration = AWSServiceConfiguration(region: .USEast1, credentialsProvider: nil)
    let userPoolConfiguration = AWSCognitoIdentityUserPoolConfiguration(clientId: CognitoIdentityUserPoolAppClientId, clientSecret: CognitoIdentityUserPoolAppClientSecret, poolId: CognitoIdentityUserPoolIdCognito)
    AWSCognitoIdentityUserPool.register(with: serviceConfiguration, userPoolConfiguration: userPoolConfiguration, forKey: AWSCognitoUserPoolsSignInProviderKey)
    pool = AWSCognitoIdentityUserPool(forKey: AWSCognitoUserPoolsSignInProviderKey)

    let credentialsProvider = AWSCognitoCredentialsProvider(regionType: .USEast1, identityPoolId: CognitoIdentityUserFederatedId, identityProviderManager:pool)
    let configuration = AWSServiceConfiguration(region:.USEast1, credentialsProvider:credentialsProvider)
    AWSServiceManager.default().defaultServiceConfiguration = configuration
    pool?.delegate = self
    return true
}