How to make username or email login in joomla 1.5

Last time I was having problem with email / username with Password login. There are several plugin but those all are paid but if you want a quick and easy method to do it. here is the code.

For Email and Username login
1. components/com_user/models/reset.php
Line Number 124
$db->setQuery('SELECT id, activation FROM #__users WHERE block = 0 AND username = '.$db->Quote($username));
Replace with
$db->setQuery('SELECT id, activation FROM #__users WHERE block = 0 AND ( username = '.$db->Quote($username).' OR email='.$db->Quote($username).' ) ');

2. plugins/authentication/joomla.php
LIne Number 73
$query = ‘SELECT `id`, `password`, `gid`, `username`’
. ‘ FROM `#__users`’
. ‘ WHERE username=’ . $db->Quote( $credentials[‘username’] )
;

Replace with

$query = ‘SELECT `id`, `password`, `gid`, `username`’
. ‘ FROM `#__users`’
. ‘ WHERE ( username=’ . $db->Quote( $credentials[‘username’] )
. ‘ OR email=’ . $db->Quote( $credentials[‘username’] ).’ ) ‘;
;

Add A line after line number 79
$credentials[‘username’] = $result->username;

Add A line after line number 103
return $credentials;

3. libraries/joomla/user/authentication.php

Line Number 121
Find $plugin->onAuthenticate($credentials, $options, $response);
Replace
$credentials = $plugin->onAuthenticate($credentials, $options, $response);

Save All the files and exit Now you can login with username or email and Password