I just received Hearthstone beta key!!

Today i checked my email and got an email from blizzard and after
reading it, it said I got invited to the Hearthstone beta!
obviously I thought it was some phising email but after
lots of calls with blizzard support where they asked whether I
opt'd in for beta, they confirmed that I was in!!! I'm
looking at the gamescreen right now and about to start a game against AI