handle_teams_event1.py

def handle_teams_event(body, event):
    # Identify event_type
    event_type = body.get("type", "")

    # Only process events we care about
    if event_type == 'message':
        
        print("🟢 Event type:", event_type)
        
        # Read table names from environment variables
        conversation_table_arn = os.environ.get("CONVERSATION_TABLE_ARN")
        token_table_arn = os.environ.get("TOKEN_TABLE_ARN")
        
        # Check for existing valid token
        dynamodb_client = boto3.client("dynamodb")
        
        # Get AAD ID from event
        aadObjectId = body.get("from", {}).get("aadObjectId", "")
        if not aadObjectId:
            print("🚫 No AAD ID found in event, exiting")
            return

        # Check if existing token. If not, send user card to send to authentication
        # Token is base64 encoded and also encrypted with a CMK key
        encrypted_token = get_token(dynamodb_client, aadObjectId, token_table_arn)