Maybe I am missing something, but why would I want to use this? I develop in Rails, where Devise is extremely simple to implement.
Do other frameworks lack a good auth plugin?
Do other frameworks lack a good auth plugin?
That being said, I don't think I would rely on an unknown API for such crucial part of my web app. In there shoes, I would just release it open source so that people can inspect the code and build street cred out of it.
[1]: http://mdounin.ru/hg/ngx_http_auth_request_module/file/a29d7...