Passwords are bad. We all know it, but we also know you're not going to build a service that doesn't use them - not if you like paying the rent. However, we can do a lot better. We'll take a whirlwind tour through the aspects of connecting people to your service, from generating passwords, not using passwords at all, creating users with one tap, identity providers, automatic cross-device sign-in, and password managers. Sign-in should be simple.