I am working to implement Twitter Card functionality for a very large e-commerce website. I work with a large team of developers with a shared code-base with very heavy controls surrounding changes and numerous phases of QA. We do have several staging environments that ARE public facing, however, they require a username/password to authenticate.
My question is: How do I validate and get approval to implement Twitter Cards if I am (currently) not working on a publicly facing website? How do I test my implementation locally if you require a public-facing website for validation. Is there another process I can go through to get approval?