Community Auth Learning...

I want to match the 'pass_string' a.k.a. password from the form versus the password currently inside the databse.
So far this is what I did.

Code:

public function show_pass_salt()
    {
        $this->load->library('authentication');
        
        $password = 'Retinitis9';
        $random_salt = $this->authentication->random_salt();
        
         $pwd = $this->authentication->hash_passwd($password, $random_salt);
         echo $pwd;
        
    }

Eventhough one of the password in the DB is 'Retinitis9' it did not match one of them.
What's the proper way to match the password from a form versus the current password in the DB.

thanks in advance.