Website created with RVsitebuilder 7 will have its own database you can access in control panel -> phpMyAdmin. You can find database name for website with Rvsitebuilder 7 in .env by this guide.

1. Go to cPanel -> File Manager -> /home// -> rvsitebuildercms -> Domain Name folder 

/home//rvsitebuildercms/

If you can't find it, you can simply enable it in Setting -> Show Hidden Files.

2. Access .env for Database information

DB_HOST=
DB_DATABASE=
DB_USERNAME=
DB_PASSWORD=

You can find "SESSION_SECURE_COOKIE=    " for SSL Certificate troubleshooting in here as well.