Apple TV+ shared with family members

In the Apple TV+ FAQ (enlace), there is a section:

When we activated this benefit, we used my wife’s Apple ID but she has 2 form authentication turned on, so it makes it harder for other family members to use it in a browser, etc.  From the FAQ, what are they referring to being able to “share” this account? 

Ideally, I would imagine we would have 1 Apple TV+ account and be able to “link” up to 5 other family members to that master account so they can use their own ID and passwords.

PS. I did check the settings from my wife’s account while on Apple TV+ and didn’t see any options around this.