Users have taken to social media to rant about an alert appearing on the app
Alert asks users to enter a code to confirm they are the owner of the account
But the code can only be texted or emailed to the holder of the Netflix account
Netflix is clamping down on password sharing but users are threatening to leave
One person tweeted that Netflix rival Disney+ 'had won the streaming wars'
But some security experts have applauded the move as it promotes online safety