I performed the initial work, and got to the Upgrade/Install Utility screen, I entered my username and password. So, now I'm getting an SQL error: Database error only visible to administrators Access denied for user 'thecoden_jbilal'@'localhost" (using password" YES)

I didn't expect that. It looks like the old login, and yet, I've checked the config.ini.php... that one matches the SQL login and password on my server. Hmmmmm... old data is somewhere else in the program.