You can change your password from your General Settings!
To get to your General Settings, log in to your account using your original email address and password. Click "Hi [Name]!" near the top right corner of the screen, then click "My Account" in the dropdown menu.
You’ll then be redirected to your dashboard. Once there, scroll down until you see the option to update your password:
Input your current password, then the new password you'd like to use, then click "Update Password." You'll be all set to log in using your new password.