After a long Christmas break, a new privacy feature in the beta version of WhatsApp is spotted.
Facebook has always been a concern about the privacy of the user. The fingerprint locked with touch-id gives the user encryption to the chats and the data.
You can simply switch to the beta community of WhatsApp by the Google play store.
One can simply join the beta community by Google play store in WhatsApp.
The dark mode is also been spotted in beta version but it is not confirmed yet when this feature gets in the stable version of WhatsApp.
To enable the fingerprint in WhatsApp go to settings > privacy > Fingerprint locked