Looking at release notes for Android Management API (Release notes | Android Management API | Google for Developers) I’ve noticed that Google have shipped an additional provisioning method of Android Enterprise devices, Sign-in URL.
The Sign-in URL challenges the user for authentication prior to proceeding with device provisioning so that different policies may be deployed at the provisioning stage based on user identity.
More information is available here: Inscribe y aprovisiona un dispositivo | Android Management API | Google for Developers
Below is the provisioning method support matrix
