Prometheus SQL exporter for RDS

Hello

I am using this SQL exporter (GitHub - justwatchcom/sql_exporter: Flexible SQL Exporter for Prometheus ). I want to know if there is a way to use this for collecting rds custom metrics (like currently running queries)? Also, I want to use .pgpass file to pass credentials for this. Is it possible with this exporter or any other? PLease help!
Thanks