Players Only

Ive noticed when playing in the poker room that there is a link to the sports book, but it asks me to sign in again. Could someone please clarify exactly what is going on over there. It looks like the sportsbook is actually a separate account that I have to create other than my poker account?

I suck at betting sports but I dont really care, I just want to put a few bucks down to spice up the weekends.