⚙️ Add EKS prep scripts

prepare-eks/20_create_users.sh

@@ -0,0 +1,24 @@
+#!/bin/sh
+
+echo "Getting list of existing users ..."
+aws iam list-users --output json | jq -r .Users[].UserName > users.tmp
+
+for U in $(cat users.txt); do
+    if ! grep -qw $U users.tmp; then
+        echo "Creating user $U..."
+        aws iam create-user --user-name=$U \
+            --tags=Key=container.training,Value=1
+    fi
+    if ! grep -qw $U users.keys; then
+        echo "Listing keys for user $U..."
+        KEYS=$(aws iam list-access-keys --user=$U | jq -r .AccessKeyMetadata[].AccessKeyId)
+        for KEY in $KEYS; do
+            echo "Deleting key $KEY for user $U..."
+            aws iam delete-access-key --user=$U --access-key-id=$KEY
+        done
+        echo "Creating access key for user $U..."
+        aws iam create-access-key --user=$U --output json \
+          | jq -r '.AccessKey | [ .UserName, .AccessKeyId, .SecretAccessKey ] | @tsv' \
+          >> users.keys
+    fi
+done