$ ls -a ~/.aws
.  ..
$ ./openshift-install create install-config --dir no-aws-cred
? Platform aws
FATAL failed to fetch Install Config: failed to fetch dependency of "Install Config": failed to fetch dependency of "Base Domain": failed to generate asset "Platform": failed to get AWS public regions: failed to get aws regions: failed to get all regions: operation error EC2: DescribeRegions, get identity: get credentials: failed to refresh cached credentials, no EC2 IMDS role found, operation error ec2imds: GetMetadata, http response error StatusCode: 404, request to EC2 IMDS failed

    

4.19.0-rc.3
    

Always
    

    1. Do not set AWS credential, e.g. remove ~/.aws/credentials or export AWS_PROFILE=non_exist_profile
    2. create install-config or cluster
    3.
    

see description 
    

If no AWS credential was not set, user could input them in installer survey.