Webmin root login issues

I have just installed a new Linux VM on Azure - Centos 6.3

installed webmin all great

I have then gone ot log in as the user and password I set up for SSH when I created the VM but it wont let me log in, I dont have the root password as it didnt offer me the root option when i installed the VM just the chance to create a user and password

Anybody please advise help?