You can change your Oberlo account email address and password from the Account page.
Changing Email Address
Type in your new email address and save changes. Take note that you can have only one Oberlo account registered with one email address.
In order to change your Oberlo account password, you will have to write your old password. If you do not remember it, you can then use the reset password feature.
Go to app.oberlo.com/login and click Forgot Password. You will get a letter to your email address from where you will be able to set a new password.