Using RDS token returns connection refused

Hi, I'm having issues connecting to and RDS using token authentication

The error reported by the server was: SQLSTATE[HY000] [1045] Access denied for user 'iam_user'@'xx.xxxx.xx.xxx' (using password: YES)

So far my investigation down to:

• Connect by using user and password (no the generated RDS token ) - works
• Connect by using user and RDS token - does not works
• Run a test using php mysqli instead PDO with (user and RDS token) - works

Example of token generated:
myDatabase-dev-cluster.cluster-cwujoxa2wlgn.us-east-1.rds.amazonaws.com:3306/?Action=connect&DBUser=iam_user&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKLIOLRyTos5FYBGXRKLA%2F20200314%2Fus-east-1%2Frds-db%2Faws4_request&X-Amz-Date=20200314T031933Z&X-Amz-SignedHeaders=host&X-Amz-Expires=900&X-Amz-Signature=a7373b21f52361addef02848382yg1232c538c730f1273d35fe84af947a12d2

I am wondering if a PDO issue and if is possible to use RDS Token with datatable somehow

No source files or tests are identified. Start by comparing the PDO and mysqli connection paths described in the report, then check the AWS RDS IAM token requirements and the connection parameters each path receives. Done means the PDO-specific cause and a reproducible supported configuration are established.