Use Touch ID to Control Your Passwords
If you have any passwords stored on your Mac, you can quickly access them with your Touch ID button. Whenever you’re going to a website that asks for your credentials — and you already have those login credentials stored — you can place your finger on the Touch ID button, and you’ll automatically log in.
You can also use your Touch ID to manage which passwords you have stored in Safari. Just go to Safari and click on the Safari menu at the top. Click Preferences and then select Passwords. You can use your Touch ID to manage all the passwords you’ve stored.
Moreover, you can also use your Touch ID to access password-protected items, like the private notes you have in your Notes app.