I'm not sure that this is advantageous for us to add, given the volume of data returned in the user object for a number of the providers, specifically OAuth-based providers.

This page is intended to provide a demo of the workflow from a user's perspective, and show the authentication methods available, but is not intended for debugging. If we did decide to make it useful for that purpose, I think we'd add a robust modal rather than dumping the payload to `alert(...)`, as the popup hides much of the payload anyway.