enhance passwords management and add default options

tasks/users.yml

@@ -1,11 +1,27 @@
 ---
-- name: percona | create users
+- name: percona | create legacy users
   mysql_user:
     name: "{{ item.name }}"
     password: "{{ item.password }}"
     host: "{{ item.host | default('%') }}"
     priv: "{{ item.priv | default('*.*:USAGE') }}"
+    plugin: "mysql_native_password"
     state: present
     login_user: root
     login_password: "{{ percona_root_password }}"
   loop: "{{ percona_users }}"
+  when: item.auth_plugin is defined and item.auth_plugin == 'mysql_native_password'
+
+- name: percona | create users
+  mysql_user:
+    name: "{{ item.name }}"
+    host: "{{ item.host | default('%') }}"
+    priv: "{{ item.priv | default('*.*:USAGE') }}"
+    plugin: caching_sha2_password
+    plugin_auth_string: "{{ item.password }}"
+    salt: "{{ percona_caching_sha2_password_salt }}"
+    state: present
+    login_user: root
+    login_password: "{{ percona_root_password }}"
+  loop: "{{ percona_users }}"
+  when: item.auth_plugin is not defined or item.auth_plugin == 'caching_sha2_password'