Today there has been a new patch rolled out regarding classes. You no longer choose a class, instead the new update has brought a hybrid system so you can be what ever you want to be.
If you would like to try this game, post here why you want the key. I may have 2 but for now i only have 1.
If you're chosen, when you get the key you will need to register on the website and go to the support section, log in there and once you've done that, submit a ticket to general giving them the key and tell them you would to start your free 2 week trial.