The following are the usernames and access information for WordPress powered by Symetricore on the AWS Marketplace. This applies to version 4.4.x of WordPress.
SSH login user
Username: ubuntu
No password is used. You should connect to your instance using the public IP address and your public key
ssh -i mykey.pem ubuntu@public-ip
WordPress
Access to WordPress is via a web browser at
http://public-ip
Navigate to your IP address to complete installation. You will see the WordPress initial configuration page, where you will create an initial administrator account.
Support
WordPress support can be found in the forums here
License
WordPress and “WordPress powered by Symetricore” is free software licensed under version 2 of the GNU General Public License. Because MediaWiki is licensed free of charge, there is no warranty, to the extent permitted by applicable law. Read the full text of the GNU GPL version 2 for details.
More information at https://wordpress.org/about/gpl/