You can log into your account even if you are physically located in a banned jurisdiction. You can also view placed bets and promotions in a banned jurisdiction. You cannot deposit or withdraw your funds from your account or place bets while physically located in a jurisdiction that does not allow sports betting. The jurisdictions currently available for sports betting can be found here:
https://sportsbook.draftkings.com/help/sports-betting/where-is-sports-betting-legal