Microsoft is now internally testing a beta version of the Authenticator app that will allow you to sign-in in your Windows 10 PC in a single tap without the need to enter the password. Unless you have a Windows 10 PC with fingerprint sensor or Windows Hello camera, you need to enter your password every time to sign-in or unlock the device.
After a quick Bluetooth sync, users can use this app to unlock their Windows 10 PC. They need to just open the app and tap on a nearby computer. Microsoft has mentioned in the Store listing that future versions will include support for Microsoft account, a sign-in solution for browsers and VPN, one-time passcode generation, and MFA approval through notifications.
Download it from Windows Store using below link.