Microsoft Login W T3

Howdy! I followed this guide to the T https://microsoft.github.io/MicrosoftCloud/tutorials/docs/Authentication-App-With-NextJs-And-Microsoft-Graph/. Unfortunately I think I might be off base in this approach as I am getting numerous errors when trying to sign in (I think this is moreso for internal organizations / internal oauth with company AD accounts?!) Either way, I would essentially like to know if anyone knows how I can reproduce the microsoft login flow that Theo and team implemented for ping.gg

Authentication App with Next.js and Microsoft Graph | Microsoft Clo...

Level: Beginner-Intermediate