It may look like Clef but under the covers it's very different. With Edge Login, the Airbitz wallet is actually created an encrypted repo that it's sharing with the client-app. Then the client app is able to put encrypted data into the repo such as private keys or transaction meta data. It's more than just authentication since you can't actually authenticate with an app that has no servers (ie. Augur). Clef, Google Login, Twitter Login, FB Login will never work with a decentralized app like Augur.