Passwords and Security Codes (OTP) are a modern necessity required for security and privacy. iOS 12 eases the tedious aspects of account setup and sign-in by automatically suggesting and using strong, unique passwords and by bringing one-time password to the QuickType bar so users can fill them with one tap. Here we'll learn how to implement these feature in your app.

https://developerinsider.co/ios12-password-autofill-automatic-strong-password-and-security-code-autofill/