Help fix my Database Error Droplet with Digital Ocean

Hi! I need some help to fix my Database Error for my wordpress website which is run by Digital Ocean.
Could be a simple troubleshoot...

This is from support: The most common reason why MySQL is not running is that it stopped or failed to start as a result of not having enough memory. Because of this, I first suggest looking into memory and, depending on the results, will provide one of two paths to resolution. It could also be due to the database login credentials being incorrect in your WordPress configuration.

This can usually be seen by attempting to start the MySQL server (service mysql start on Ubuntu and some other systems) You can find more info on the usage of these commands https://www.techrepublic.com/article/how-to-start-stop-and-restart-services-in-linux/ and then reviewing the MySQL error log (usually in /var/log/mysql/error.log or similar file path).

Please refer to the below link, which would assist you in how to troubleshoot the Database error:
https://www.digitalocean.com/community/tutorials/how-to-debug-the-wordpress-error-establishing-database-connection

Here’s some more information that can help:
https://wordpress.org/support/article/editing-wp-config-php/
https://www.elegantthemes.com/blog/tips-tricks/how-to-fix-error-establishing-a-database-connection-in-wordpress
https://www.wpbeginner.com/wp-tutorials/how-to-fix-the-error-establishing-a-database-connection-in-wordpress/
https://www.designbombs.com/how-to-fix-error-establishing-a-db-connection-error/

Droplets are a self-managed service and we aren't able to access customer Droplets at the command line or application level.