Migration error

Hello, I am trying this plugin to split up my database to accommodate a large number of sites. I have configured everything according to the documentation but it seems something is missing. When i try to run the SharDBMigration from settings i get the below error.

Error: You must configure your database settings by adding require(‘./db-settings.php’); to your /var/www/blogs.myblogs.com/wp-config.php for the migration process to work

I have added the below lines to the wp-config.php file but its almost as it it doesn’t see the file.

define(‘DB_COLLATE’, ”);
require(‘db-settings.php’);
define(‘VHOST’, ‘no’);
$base = ‘/’;
define(‘DOMAIN_CURRENT_SITE’, ‘blogs.myblog.com’ );
define(‘PATH_CURRENT_SITE’, ‘/’ );
define(‘BLOGID_CURRENT_SITE’, ‘1’ );

My db-settings.php file changes are below

// how many characters of hexidecimal hash
$shardb_hash_length = 1;
// what is the prefix of your blog database shards (everything before the hexidecimal hash)
$shardb_prefix = ‘myblogs_blogs’;
// set a string to be used as an internal identifier for the dataset
$shardb_dataset = ‘123’;
// do you want to put your primary blog (blog_id 1) in its own ‘home’ database?
$enable_home_db = true;
// how many, if any, VIP databases do you have?
$num_vipdbs = 0;
// add this to set the write master read priority (default 1)
$shardb_master_read = 99;
// add this if all of your databases are on a local server
$shardb_local_db = true;
// use this function to add a read slave host
add_slave($read_priority, $hostname, $local_hostname, $user, $password);

Any help would be appreciated.