BiometricUtil.kt

fun showBiometricPrompt(
    title: String = "Biometric Authentication",
    subtitle: String = "Enter biometric credentials to proceed.",
    description: String = "Input your Fingerprint or FaceID to ensure it's you!",
    activity: AppCompatActivity,
    listener: BiometricAuthListener,
    cryptoObject: BiometricPrompt.CryptoObject? = null,
    allowDeviceCredential: Boolean = false
) {
  // 1
  val promptInfo = setBiometricPromptInfo(
      title,
      subtitle,
      description,
      allowDeviceCredential
  )

  // 2
  val biometricPrompt = initBiometricPrompt(activity, listener)

  // 3
  biometricPrompt.apply {
    if (CryptoObject == null) authenticate(promptInfo)
    else authenticate(promptInfo, cryptoObject)
  }
}