list IAM keys / identities (awscli, underscore-cli or jq)

list-iam-keys-by-user-jq.sh

for u in $(aws iam list-users  | jq ".Users[].UserName" --raw-output); do 
  aws iam list-access-keys --user $u | jq '.AccessKeyMetadata[] | .UserName + ":" + .AccessKeyId' ; 
done

list-iam-keys-by-user-underscore.sh

# list iam keys by user in an easily grepable format.
# easily find which identity matches a particular iam key

# requires underscore-cli

names=$(aws iam list-users | underscore flatten | underscore pluck "UserName" | tr -d '[],"')
for name in $names; do
    keys=$(aws iam list-access-keys | underscore flatten | underscore pluck "AccessKeyId" | tr -d '[],"')
    for key in $keys; do
        echo "$name : $key"
    done
done