My Netflix account was hacked?

Suddenly a new user appears on Netflix. I have seen in the activity log that probably someone has been secretly watching with me for some time.
What is the best way to do it now?

Change Password?

Log out of all devices and change password.

Change your password. If you do that you will be offered the option "log out of all devices", you have to do it so that everyone logged in has to log in again with a new password.

Thank you for your prompt reply!