Hi, we have some external Authentication (http://doc.dynamicweb.com/documentation-9/users/user-management/external-authentication) like facebook, google and twitter.
The instagram plataform is growing, today they have a double times more users than twitter... (https://www.statista.com/statistics/272014/global-social-networks-ranked-by-number-of-users/)
Maybe will be good to have this type of external Authentication.