Presently, our SSO functionality for existing users of Clustermarket is simply an alternative way of accessing the system. When an existing user authenticates using SSO for an email address that matches their Clustermarket account, our system will seamlessly integrate the old account with the SSO process, providing them with two ways of logging in. Using the SSO enforcement option (described above) for new users via invitations, however, ensures that these new users must authenticate via SSO in order to respond and gain access.