Adding check for aws cli in $PATH

docs/api-server/README.md

@@ -0,0 +1,6 @@
+# Kops HTTP API Server
+
+### Notes:
+
+
+ - https://github.com/kubernetes/kubernetes/pull/40803

hack/new-iam-user.sh

@@ -38,6 +38,8 @@ if [ -z "$2" ]; then
     usage
 fi
 
+command -v aws >/dev/null 2>&1 || { echo >&2 "The aws cli is required to run this script."; exit 1; }
+
 GROUP=$1
 USER=$2