multiple login credentials for a contact
In our business, a contact is a family. Our members are families who join our club. As many families have 2 or more adults, we have had several requests to support 1+ login credentials for the same member/contact.
In other words, the Munster family belongs to our club and both Herman and Lily have a login to the same member experience and profile, Grandpa and Eddie have logins with restricted capabilities (view only, can register for events but cannot pay).