Netflix allows you to kick off or "sign out" unwanted devices from your account. There are a couple of ways to go about it. You can choose to sign out individual devices from your account or sign out of all signed in devices at the same time. To do so, head over to your My Netflix page>Account>Manage access and devices or Sign out of all devices. However, do note that if someone has your Netflix credentials, they can simply log back in. To prevent that, you will need to change your Netflix account password after kicking them.

You can easily change your Netflix account using the Android, iOS or Windows app, or take to the web version using a PC browser. To do so, head over to your Netflix Account Settings -> Change password. Now, if you want to take additional security measures, when changing the password, simply tick the "Sign out of all devices" box. Then, you can simply hand over your Netflix password to only those that you want to share the account with.