/**
* Set Recurly username and password.
*
* @param string $username Recurly username
* @param string $password Recurly password
*/
public static function SetAuth($username, $password, $subdomain, $environment = 'production', $private_key = null)
{
if (!in_array($environment, array('production', 'sandbox', 'development'))) {
throw new RecurlyException("Environment must be production or sandbox.");
}
self::$username = $username;
self::$password = $password;
self::$subdomain = $subdomain;
self::$environment = $environment;
self::$private_key = $private_key;
}