PhoneNumberConsent.kt

@Composable
fun PhoneNumberConsent(
    onPhoneNumberFetchedFromDevice: (phoneNumber: String) -> Unit,
) {
    val context = LocalContext.current

    val getPhoneNumberConsent =
        rememberLauncherForActivityResult(ActivityResultContracts.StartIntentSenderForResult()) { result: ActivityResult? ->
            if (result?.resultCode == Activity.RESULT_OK && result.data != null) {
                val credential = result.data!!.getParcelableExtra<Credential>(Credential.EXTRA_KEY)

                if (credential != null) {
                    Timber.d("Phone number fetched from auto fill")
                    onPhoneNumberFetchedFromDevice(credential.id)
                }
            } else {
                Timber.d("No number selected or unavailable. User can type manually.")
            }
        }

    LaunchedEffect(Unit) {
        val credentialsClient = Credentials.getClient(context)

        val hintRequest = HintRequest.Builder()
            .setPhoneNumberIdentifierSupported(true)
            .build()

        val intent = credentialsClient.getHintPickerIntent(hintRequest)
        getPhoneNumberConsent.launch(IntentSenderRequest.Builder(intent.intentSender).build())
    }
}