Integration of AWS RDS and Zoho Flow

Integration of AWS RDS and Zoho Flow

Hello!
I am not good at English so sorry if it is hard to read.

I saw the following article and wondered if it is possible to use Zoho Flow to add new records to the AWS RDS that I use as a database for my web application when certain actions are detected in Zoho CRM.
Right now, when I want to register CRM information to RDS, I have to create an API for registration on the web application side, which is very expensive to develop.

I would like to know the detailed procedure on how to set it up if it is possible!
As far as I can tell, it is possible to do this by creating an external integration for Mysql in Zoho Flow, but I'm not sure if that is correct.