ssh public key now defined as variable. User can define it under the main deployment file

multiple/shared_modules/cloud_init.yaml

@@ -0,0 +1,10 @@
+#cloud-config
+disable_root: true
+users:
+  - name: groot
+    sudo: ALL=(ALL) NOPASSWD:ALL
+    groups: wheel,sudo,adm
+    shell: /bin/bash
+    ssh_authorized_keys:
+      - ${ssh_key}                                                                                                                                                                   
+    ssh_pwauth: false

multiple/shared_modules/variables.tf

@@ -42,8 +42,7 @@ variable "cloudinit_filename" {
 
 variable "ssh_key" {
   description = "SSH authorized keys for cloud-init"
-  type        = list(string)
-  default     = []
+  type        = string
 }
 
 variable "user_data" {