add a page that members can print/share to verify their membership #2212

this would be a link you can reach on your membership page

it would be a url like sce.sjsu.edu/verify/id_of_member_in_mongodb

and the page would have a qr code to reach it, for someone else to verify. the page mentions the name, email and expiration date

green text if they are a member, gray text if not