The log in to the web store is different to the login to the distribution platform. The user name is the same its just that the passwords are different.
You would log into the web store to see your purchases or make new purchases. https://musicinfo.io/customer/account/login/
You would log into the distribution platform to make your release and publish your music. https://distribute.musicinfo.io/
Please note that the username is case sensitive, sometimes your device may automatically capitalize the first letter.
If you need a new password click, “forgot your password?” to get a new one.