The latest Android devices now let you log into apps without requiring a password

Here’s a good reason to update to your latest version of Google Play Services: Android devices running version 7.0 and later can now log you into apps and websites without requiring you to type in a password. Using FIDO2, an open standard developed by the FIDO Alliance, the update instead uses your fingerprint or PIN to log you into various services.
Read more: https://www.theverge.com/2019/2/25/18239389/android-7-update-fido-alliance-fido2-password-free-authentication?source=Snapzu