Libcurl

CURL *hnd = curl_easy_init();

curl_easy_setopt(hnd, CURLOPT_CUSTOMREQUEST, "GET"); //method

curl_easy_setopt(hnd, CURLOPT_URL, "http://blizzcmsv2.fixcore.fx/api/ApiAccount/user/"); //this is my website url

struct curl_slist *headers = NULL;

headers = curl_slist_append(headers, "authorization: Basic MYCREDENTIAL"); //this is my credential

headers = curl_slist_append(headers, "x-api-key: MYCODE@123");  //this is my Api key

headers = curl_slist_append(headers, "content-type: multipart/form-data; boundary=---011000010111000001101001");

curl_easy_setopt(hnd, CURLOPT_HTTPHEADER, headers);

CURLcode ret = curl_easy_perform(hnd);