User Login not defined

As a Newbie to Rockstor I may have missed something obvious but I have just installed Rockstor and have been asked to provide a login which I haven’t defined. so therefore have no idea what it is. My search through documentation, forums and google have come up with a few candidates but none of then work.

I thought I missed something and tried to reinstall Rockstor but nowhere did it specify a log in. Again I’m a newbie so apologies if I missed something obvious.