adding-to-mysql-troubleshooting (#14323)

Author: erica-airbyte

docs/integrations/sources/mysql.md

@@ -22,6 +22,9 @@ There may be problems with mapping values in MySQL's datetime field to other rel
 Some users reported that they could not connect to Amazon RDS MySQL or MariaDB. This can be diagnosed with the error message: `Cannot create a PoolableConnectionFactory`.
 To solve this issue add `enabledTLSProtocols=TLSv1.2` in the JDBC parameters.
 
+Another error that users have reported when trying to connect to Amazon RDS MySQL is `Error: HikariPool-1 - Connection is not available, request timed out after 30001ms.`. Many times this is can be due to the VPC not allowing public traffic, however, we recommend going through [this AWS troubleshooting checklist](https://aws.amazon.com/premiumsupport/knowledge-center/rds-cannot-connect/) to the correct permissions/settings have been granted to allow connection to your database.
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 ## Getting Started \(Airbyte Cloud\)
 
 On Airbyte Cloud, only TLS connections to your MySQL instance are supported. Other than that, you can proceed with the open-source instructions below.