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SQL Database Connector - it doesn't work at all

First of all. There is almost no information in the manual about SQL DATABASE CONNECTOR, just an example of connecting to Mysql in an AWS instance.
QUESTION: Can I ONLY create a mysql database on AWS?
Other connections with postgresql and mysql in other providers, and it doesn’t connect at all. All kinds of errors, timeouts, among others.
It has no string detail.

HOW TO SOLVE ???
I want to connect with postgresql and mysql in OTHER CLOUD PROVIDERS.

Here in the support/forum a lot of people with the same problem and NO ANSWERS.

Thanks