change ansible password only on user creation

ansible/bootstrap.yml

@@ -17,7 +17,8 @@
         # Directly generate hash 
         # https://www.lisenet.com/2019/ansible-generate-crypted-passwords-for-the-user-module/
         password: "{{ ansible_crypted_password | password_hash('sha512') }}"
-        shell: /bin/bash 
+        shell: /bin/bash
+        update_password: on_create
         system: yes
         home: /srv/ansible
         state: present