what functionality does this provide that /authbot and bot framework auth doesn't

[myusrn]

Looking at https://github.com/MicrosoftDX/AuthBot repo it suggests that the bot framework now has oauth based authN/authZ support provided [ https://docs.microsoft.com/en-us/azure/bot-service/bot-builder-tutorial-authentication?view=azure-bot-service-3.0 ].

Can you provide insights on what functionality is this work providing that is not covered by the current bot framework support for oauth authN/authZ?