How to play Battlefront with internet down.

Internet went down, and I want to play Battlefront 2 in single player. I bought it using steam and it auto launches the Origin app. I am unable to launch the game as the online login is currently unavailable for Origin(internet outage)so I can’t get past the sign in screen for the origin app. Is there a way for people who bought and paid for a game to play the single player mode when the internet goes out? What about playing the single player mode requires internet?