add database & users creation

defaults/main.yml

@@ -10,4 +10,7 @@ mariadb_major_version: "12"
 
 # Force repository update (useful when upgrading major versions)
 # Set to true to force recreation of repository configuration
-mariadb_force_upgrade: false
+mariadb_force_upgrade: false
+
+mariadb_databases: []
+mariadb_users: []