Read carefully points 1 to 3 and this problem will be solved in a moment.
Info: Your Login information (username and Password) were confirmed by E-mail when you subscribed. The subject was : "Drawing class: your Login info"
Try to find it because your username and password are in it.
but...
If you have already entered your private space and you changed your Password in "My profile" , the Password mentioned in 1 is not correct anymore.
Delete that E-mail in order to avoid any confusion in the future.
If you have lost the E-mail mentioned in 1 or if you are not sure about your username, or if you forgot your password, there is a solution :
use this form