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working on a membership site, we had to create multiple level of users. We did not want the users to have access to the WP-Admin panel because it was not customized for their experience. Rather we had put everything necessary (such as edit profile page), user dashboard etc, on the front-end. While S2 Membership Plugin allowed for us to disable wp-admin access for all users except for admins.
Thank you for watching.
Best Regards Adamzy