added task checking for administrative login use

roles/init-server/tasks/install-pkgs.yml

@@ -1,6 +1,10 @@
 #SPDX-License-Identifier: MIT-0
 ---
 # tasks file for roles/init-vps
+- name: Checking whether administrative login used
+  when: ansible_facts["user_id"] not in (admins | map(attribute="username") | list)
+  ansible.builtin.fail:
+    msg: Must use administrative user for subsequent tasks
 - name: Creating prerequisite directory tree
   ansible.builtin.file:
     path: "{{ ansible_facts['user_dir'] }}/.local/bin"