If you used your Google account credentials to register, you did not need to create a password for MCG. Yet, you will need a password if you want to use WordPress Plug-In to embed courses in your website.
You can create a password for your MCG account under the “Profile” section, which can be accessed through under the name tag.
After you find the “Change Password” box there, you can create a password for your account.
Once you create your password, you can login to the WP Plug-In as well.