To edit config file, access App folder, then Config folder and finally open config.php file.
DB_NAME – name of the database you are using for the website.
DB_USER – name of the user assigned to this database.
DB_PASSWORD – password for the user assigned to the database.
DB_HOST – you need to use exactly ‘localhost’ or ‘127.0.0.1’.
URLROOT– the base url of your website.
Note that all the above settings are automatically populated during installation.