Let me explain my issue in detail.
I have this in "On conversation Start"

When i test the bot , it displays my name in the chat
But if i publish the bot in teams, then it shows this error.
An error has occurred. Error code: AuthenticationNotConfigured Conversation Id: xxx [sample]
Time (UTC): 2023-02-16 09:43:48Z.
Authentication settings im using is

if i remove the user system variable and publish the bot to teams then it is working
but it is not working if i add user system variables? like user.first name or user.display name..
i think i dont have to setup AAD for teams as it is automatically setup..
can someone help me?