Unfortunately, the next-auth documentation does not include any built-in features for managing multiple users under one account.
However, the beauty of next-auth lies in its flexibility and potential for customization. Implementing a feature like this could be an exciting challenge and not overly complicated. Next-auth is designed to serve as a foundation for implementing such unique features, rather than being an all-encompassing service like Firebase.
If your goal is to create a setup similar to Netflix, where one account can have multiple 'sub-users,' a possible solution would involve linking a specific field to a list of sub-user IDs. This way, you can easily manage these sub-users using CRUD operations (Create, Read, Update, Delete).
For instance, you could utilize a database adapter such as MongoDB with next-auth, adding a new field for storing sub-user IDs associated with each account. Users could then select which sub-user they want to access, treating it like a regular user by querying their ID and retrieving relevant data.