Issue with configure etl validator node

We are having problems with the password. It is correct and we changed it multiple times but when we log into support ssh -i. The very first part of won’t recognize the password but it did for another persons account. Can you help??

Please refer the below given link which could have a solution to your problem:
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/EC2_GetStarted.html