Fabric.io > Digits > Xojo Web App?

I used Parse.com. Now Parse.com will shut down there services. So I found fabric.io

Does anyone use fabric.io with a Xojo WebApp? Sounds for me very interesting.

My problem: I want to use the login with the mobile phone number [fabric.io & Digits] but I don’t know how I could connect this with the WebEdition of Xojo.
Login via SMS Code sounds cool.