Hi dear,
Thanks for nice Library.

I used Object mapping. after run code:
$user = user::byId(1);
$user->password = 'demo2';
$user->save();

But not saved!, I traced code, and problem at dbObject.php
public function update ($data = null) {
if (empty ($this->dbFields))
return false;
...}

$this->dbFields is empty and not defined.

"thingengineer/mysqli-database-class": "v2.9.3"
PHP 7.4.4

Thanks