Connect to restful api data source multiple times

Hi,

We managed to get to conect to the api using PHP but wanting to do it in PowerBi.  How would I go about translating

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "https://api.secondstreetapp.com/sessions");
//curl_setopt($ch, CURLOPT_URL, "https://www.google.com");
//$data = array("sessions"=>array("username"=>"****", "password"=>"***"));
$data = '{"sessions":[{"username":"*****", "password": "*******"}]}';
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST"); 
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Accept: application/json','Content-Type: application/json', 'X-Api-Key: *****'));
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS,$data);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_VERBOSE, true);
$session = curl_exec($ch);
echo curl_error($ch);
curl_close($ch);
$sessionDecoded = json_decode($session);
if ($campaignID == null)
{



	$ch = curl_init();
	curl_setopt($ch, CURLOPT_URL, "https://api.secondstreetapp.com/message_campaigns?statusTypeId=1");
	curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "GET"); 
	curl_setopt($ch, CURLOPT_HTTPHEADER, array('Accept: application/json','Content-Type: application/json', 'X-Api-Key: *****', 'Authorization:'.$sessionDecoded->sessions[0]->access_token, 'X-Organization-Id:'.$sessionDecoded->sessions[0]->organization_id));
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
	curl_setopt($ch, CURLOPT_VERBOSE, true);
	$newsletters = curl_exec($ch);
	echo curl_error($ch);
	curl_close($ch);

	$newslettersDecoded = json_decode($newsletters);
	echo "<div class='list-group'>";
 	echo "<h1>Select a message</h1>";
	foreach ($newslettersDecoded->message_campaigns as $campaign)
	{
 		echo "<a href='index.php?campaignid=".$campaign->id."&messagetype=".$campaign->message_campaign_type_id."' class='list-group-item'>".$campaign->name."</a>";
 	}