src/NexmoAccount.php
public function updateAccountSettings($data = array())
    {
        $response = $this->client->post('/account/settings/'.$this->nexmo_key.'/'.$this->nexmo_secret, array(
                        'headers' => array('Content-Type' => 'application/x-www-form-urlencoded'),
                        'query' => $data
                    ));

        return $response->json();
    }
public function updateAccountSettings($data = array())
    {
        $response = $this->client->post('/account/settings/'.$this->nexmo_key.'/'.$this->nexmo_secret, array(
                        'headers' => array('Content-Type' => 'application/x-www-form-urlencoded'),
                        'query' => $data
                    ));

        return $response->json();
    }
/*
Define moCallBackUrl & drCallBackUrl in array input, otherwise it will read as blank & get overwritten.