Captive portal radius auth

Could we get an option to have a Captive Portal offer a guest login, and instead of using Facebook, token or fixed user list, use a radius or ldap lookup for guest users?

The use case is club type environments that have a membership database, and we want to authenticate them in the captive portal by their membership number from that database.

any interest in this? Its common in hospitality to use a membership database to authenticate get wifi, via something like Clearpass.