public function login($credentials)
{
// Reading the different parameters.
$this->_user = $credentials['user'];
$this->_pass = $credentials['password'];
$wsdlUrl = 'http://webservices.dgperform.com/dgmpublisherwebservices.cfc?wsdl';
// Setting the apiClient.
$this->_apiClient = new \SoapClient($wsdlUrl, array('encoding' => 'UTF-8', 'compression' => SOAP_COMPRESSION_ACCEPT | SOAP_COMPRESSION_GZIP | SOAP_COMPRESSION_DEFLATE, 'soap_version' => SOAP_1_1));
}