Showcase.yaml not working

[anoora17]

Metadata:

• Operating System: (enter aws ami/ centos 7.6 redhat)
• Installation method: (choose between RPM)
• AWS CLI Version: (exec aws --version and aws-cli/1.16.13)

(describe your issue here)
I used the rpm method after uploading the ssk key to the IAM and verified the correct iam permission.
and configured the /etc/aws-ec2-ssh.conf
ASSUMEROLE='ec2 role that has the permission to get the ssh keys"
IAM_AUTHORIZED_GROUPs='the IAM group that users are in '
SUDOERS_GROUPS= "groupname"

still cannot ssh to the bastion by username

[michaelwittig]

We do not support RHEL 7.6 is not supported as clearly stated in the README of this project.

Other people seem to have a problem as well with 7.6 #145