Let's make your code more flexible.

1. Define the AuthMixin class.
2. Cut the login and logout methods from the User class and insert them into the AuthMixin body.
3. Move the is_authenticated class attribute to the AuthMixin.
4. Inherit the User class from the AuthMixin.

Note

After performing all the actions, you will have an authorization mixin (AuthMixin) that can be used for different user classes.