If its not a lot of “products” then you can still use the default data plugin
The user info is in a file users.php in the plugins data folder.
$users_data = array(
0 => array(
'login' => 'antawn',
'pass' => '1234567890',
'display_name' => 'Antawn Jamison',
'email' => 'email1@aol.com'
),
1 => array(
'login' => 'chynna',
'pass' => '1234567890',
'display_name' => 'Chynna Phillips',
'email' => 'email2@aol.com'
),
2 => array(
'login' => 'kiki',
'pass' => '1234567890',
'display_name' => 'Kiki Cuyler',
'email' => 'email3@aol.com'
),
You can see how it would be easy to change and add more to this array. You would edit this info before activating plugin. Then just choose the add users option in the plugin set up.