Merge branch 'Issue-18' into 'master'

Issue 18

Closes #18

See merge request !36

roles/devops-ssh-users/tasks/main.yml

 ---
 
-- include_role:
+- name: Include add_sudo_users role
+  include_role:
     name: add_sudo_users
   vars:
     users: "{{ devops_users }}"
   tags:
     devops-ssh-users
 
+- name: Get users from passwd
+  getent:
+    database: passwd
+
 - name: Revoke ssh user keys
   authorized_key:
     user: "{{ item.username }}"
@@ -14,6 +19,6 @@
     state: absent
   loop: "{{ ssh_revoked_keys }}"
   ignore_errors: "{{ ansible_check_mode }}"
-  when: ssh_revoked_keys is defined
+  when: ssh_revoked_keys is defined and item.username in getent_passwd
   tags:
     devops-ssh-users