public function login($credentials)
{
$user = $credentials['user'];
$password = $credentials['password'];
$this->_serverUrl = "https://mats.silvertap.com/";
$this->_client = new \Oara\Curl\Access($credentials);
$loginUrl = $this->_serverUrl . 'Login.aspx?ReturnUrl=/';
$valuesLogin = array(new \Oara\Curl\Parameter('txtUsername', $user), new \Oara\Curl\Parameter('txtPassword', $password), new \Oara\Curl\Parameter('cmdSubmit', 'Login'), new \Oara\Curl\Parameter('__EVENTTARGET', ''), new \Oara\Curl\Parameter('__EVENTARGUMENT', ''));
$urls = array();
$urls[] = new \Oara\Curl\Request($loginUrl, $valuesLogin);
$this->_client->post($urls);
$this->_exportPassword = \md5($password);
$this->_exportUser = self::getExportUser();
}