Google authentication sounds like the least of your worries.
wp-config.php lives in the public_html folder of your website, not in SQL database.
Assuming everything else is configured correctly, then you will simply need to put your SQL info into wp-config.php and then go to your main website url via the browser
If wp-config.php doesn’t exist in /public_html folder, then look for wp-config-sample.php and rename it to wp-config.php
The last issue you’re encountering with the email address and user id is rather surprising if you’re generating a database connection error…