Use Azure Logged In User in Yii

I’ve just migrated a Yii2 App to Azure. The issue that I’m now facing is the users have to log into Azure and then log in to my app. I’d like to do away with my Yii app login if possible. Thus my question if there is a way for me to retrieve which Azure user is actively in the system?

If someone could point me in the right direction it would be truly appreciated. I’m not even sure what to search for at this point in time, or if this type of thing is even plausible.