Yes, you can write headers. Here is an example:
var baseUrl = params.getParam('config', 'statsApi.url', 0).getValueAsString();
var user = params.getValue('statsApi.user', 0);
var pass = params.getValue('statsApi.pass', 0);
var encStr = Base64.encode(user + ':' + pass);
headers["accept"] = "application/x-www-form-urlencoded";
headers["user-agent"] = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.121 Safari/537.36";
headers["Authorization"] = "Basic " + encStr;
headers["Content-Length"] = 0;
ogscript.asyncHTTP(baseUrl, "POST", headers, '', callback);
Let me know if you need more guidance than that.
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