Hi Dromus-
Locating your Database Connection information is going to depend on your hosting provider.
Most of the time, your database will be hosted on the same server as your website, so the address will simply be 127.0.0.1 .
Here’s an article with more information on how to troubleshoot Database connection issues.
If you’re using a cPanel-based server, here are instructions for resetting your database password in cPanel. Here are instructions to reset the password if your server is using Plesk.
If you’re not using cPanel or Plesk, you should reach out to your server’s administrator for more assistance.