You shouldn’t share your Apple ID credentials with anyone. You agreed that you would keep the account secure. The account is for individual use, and sharing may have unforeseen consequences (including financial) that can’t be undone. Just don’t.
The Disney+ app and its subscription supports Family Sharing, which is how sharing is intended to be used in the Apple eco system. Then each group member can access the content and services on their own account.
Family Sharing - Apple Support
Set up Family Sharing - Apple Support
One adult person will have to be the Organizer, and the others will be invitees.