Remember that it is just setting a cookie, so if you make a mistake typing it, it cannot tell because there is no back end validation.
check your email for the password it sends you. that is your password.
No, anyone can view the gallery, try and create one and if it prompts you to log in you can enter your email and password; if it works then you did it right (but you'll need to do it again over here too)
Fuckin KEK!