Solved
$itemid=0;
$fs = get_file_storage();
$draftcontext = context_user::instance($USER->id);
$draftitemid = file_get_submitted_draft_itemid($draftcontext->id);
file_prepare_draft_area($draftitemid, $draftcontext->id, 'user', 'draft', $itemid);
$filerecord = array(
'contextid' => $draftcontext->id,
'component' => 'user',
'filearea' => 'draft',
'itemid' => $draftitemid,
'filepath' => '/',
'filename'=>$filename);
$urlparams = array(
'calctimeout' => false,
'timeout' => 5,
'skipcertverify' => true,
'connecttimeout' => 5
);
try....