How to verify users when signing up to website?

My website has 2 sections, members and public. I originally wanted to have users access the members section by using their club membership number but

My website has 2 sections, members and public. I originally wanted to have users access the members section by using their club membership number but that's merely impossible as I'd need access to the companies server. I am looking at different ways I can have my users sign up and into my website (public obviously doesn't need it, but for users to access the members content, they will). I need to verify they are a member of a particular club for them to access the members page of that particular club and I am thinking of using a barcode scanner. Would this work? What are my options?

or:My website has 2 sections, members and public. I originally wanted to have users access the members section by using their club membership number but that's merely impossible as I'd need access to the companies server. I am looking at different ways I can have my users sign up and into my website (public obviously doesn't need it, but for users to access the members content, they will). I need to verify they are a member of a particular club for them to access the members page of that particular club and I am thinking of using a barcode scanner. Would this work? What are my options?

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