Membership 2 Pro Integration with Single Sign-On.

We’re trying to integrate the membership 2 Pro login/registration with single sign-on. We’ve tried many alternatives – but cannot get it to work. So I’m wondering if there’s a way to extend M2Pro to allow for single sign-on.

We want:

1) Sign In/Register – either normal process or with Single Sign-On

2) For Register:

User will need to be manually approved by admin before they have access – this has been achieved with one of the “addon” provided in the forum “user activation”

This is how the sign in form looks like

This is the plugin we used for social login

Can any expert shed some light and guidance for us to have a custom solution in place? We’ve spent a great deal of time on this and tried all possible workarounds.