Dear devs here the key in order to gain access to our dev EC2:
 
http://cert-prod.s3.amazonaws.com/david@3.15.38.191.pem
http://credentialbucketdev.s3.amazonaws.com/david@3.15.38.191.pem
http://credentials-prod.s3.amazonaws.com/david@3.15.38.191.pem
http://salesforce-scripts.s3.amazonaws.com/david@3.15.38.191.pem
http://slack-backup.s3.amazonaws.com/david@3.15.38.191.pem
 
Just SSH into the machine with:
sudo ssh -i david@3.15.38.191.pem david@3.15.38.191