Can an app restrict account creation to admins only?

Shopify Apps
1

Hi all,

I need an app that can do the following:

  1. I need the ability for people to be able to sign into their account HOWEVER I don’t want people to be able to sign up for an account on their own. PPF is a nonprofit. Our membership dues are processed through a third party. So I want to be able to create an account for our online shop for our members only. I hope that makes sense.

My website is www.pennsylvaniaparks.org

I am using the simple theme

Thanks!