Google Appengine中的OAuth2.0提供程序。没有谷歌帐户 - Python

I want to implement a OAuth2.0 provider. I know Appengnine provides a library for that but looks like the users will be required to have a Google account. Has anyone found a way around this? Basically I want to have my own user authentication system and allow them to grant access to other apps(clients/consumers)I want to implement a OAuth2.0 provider. I know