$client_id = '1000.DVWESFDFGH1UI51RA0GHGHHDXTSOM2F';
$client_secret = '9e7a518438be1cfb456b6ce92fc2ij3kj20c67b';
$code = '1000.2626eccb001d3b6859b5c4ab9456ccfb.dccd2d8a876ddc92be381231235ac14346e';
$token_url = $base_acc_url . '/oauth/v2/token?grant_type=authorization_code&client_id=' . $client_id. '&
generate_refresh_token($token_url);
function generate_refresh_token($url){
$ch = curl_init();
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_POST, 1);
$result = curl_exec($ch);
curl_close($ch);
print_r($result);
return $result;
}