Flex Registration Tomorrow - ProctorU Login?

Hello! I'm a first-time LSAT test taker and I received my email yesterday about registering for the multiple time slots for the flex this February. If you're a first-timer, does the LSAC email you your ProctorU login the day of registration? Or do they email you prior? As of now, I don't have any login information and I want to make sure that I'm prepared for tomorrow.