错误提示：method not exist:think\db\Query->sava

代码信息 public function addUserModel($data)
{
//return var_dump($data);
$user=new User($data);
/* $user->username=$data['username'];
$user->password=$data['username'];
$user->email=$data['email'];
$user->phone=$data['phone'];
$user->realame=$data['realame'];
$user->addtime=$data['addtime'];
$user->companyid=$data['companyid'];
$user->addtime=$data['addtime'];*/
$addUserModel=$user->allowField(true)->sava();
return $$resultAddUser;

}
$data是一个表单提交的post数据。