That's a pretty common issue. Keep in mind that we have two main websites:
DDPYoga.com is for purchasing the DVDs and related merchandise.
DDPYogaNow.com is for our app and managing your account.
Both websites have "forgot password" features that'll help you get in there and through support we can help you with that as well.
Special note: On DDPYogaNow.com make sure that you're not using any special characters like "#" as that will cause an issue with the password and you won't be able to login.