Customize the Authentication UI

AuthenticatorActivity.kt

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        // Create an auth UI configuration
        var uiConfig = AuthUIConfiguration.Builder()
                // Specify the providers
                .userPools(true)
                .canCancel(true)
                // Specify the UI customizations
                .logoResId(R.drawable.icon_tasks)
                .backgroundColor(ContextCompat.getColor(this, R.color.colorPrimary))
                .isBackgroundColorFullScreen(true)
                // Build the configuration
                .build()

        // Pull in the SignInUI
        val ui = AWSProvider.instance!!.getClient(this, SignInUI::class.java) as SignInUI
        ui.login(this, MainActivity::class.java)
                .authUIConfiguration(uiConfig)
                .execute()
    }