Registering a new Extension with devise

[wp4nuv]

I'm working on a proof of concept around user authentication with Cognito. As there are extensions for other services, I was wondering if a new extension needs to be "registered" with the main devise gem? (It's my first time writing a gem, so any clue helps!)
The idea is for the gem to handle connecting to AWS and authenticate with the Cognito identity provider.

I think this will enhance devise's extension offering unless there's a generic one that can handle any external authentication source.