If you got master to install on your server then congrats you are doing better then me. Because I couldn't get the backup to install on my server, says that the backup zip file is missing a file, I just duplicated Bills wordpress installation best I could and made my own master. There for I didnt have a password issue, however I am sure the site is not as optimized as Bills, but I can now clone that site.
If you can not get the wp-admin password you can reset the WP admin pass word with FTP access via the functions.php page. Below is a link for the line of code you to place on the page to make this possible. Just remember to re-edit the php file and remove the code as soon as it is reset. Hope it helps here is the link: