无法弄清楚如何使用字符串主体进行经过身份验证的httpRequest调用

Question

我一直在努力寻找如何编写一个云函数，该函数可以对需要用户名和密码的另一台服务器进行POST调用...

我迅速拥有了原始代码：

NSURL *url = [NSURL URLWithString:"https://myserver.com/mypath/"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
[request setHTTPMethod:@"POST"];    
NSString *data = [NSString stringWithFormat:service_request, myDevice, myPath];
[request setHTTPBody:[data dataUsingEncoding:NSUTF8StringEncoding]];    
provisionDeviceConnection = [NSURLConnection connectionWithRequest:request delegate:self];
[provisionDeviceConnection start];

到目前为止，我的Cloud Function中已有此功能：

Parse.Cloud.define("getMyDevice", function(request, response){
    var service_request = "<request version=\"1.0\"><file_system cache=\"false\"><targets><device id=\"xxx\"/></targets><commands><get_file path=\"myfile.json\"/></commands></file_system></sci_request>";
    return Parse.Cloud.httpRequest({
        method: "POST", url: "https://MYSERVER.COM/MYPATH/", headers: { },
        body: service_request
      }).then(function(httpResponse) {
        response.success("Done Http Request!");
    }, function(httpResponse) {
        response.error('request failed with response code ' + httpResponse.status);
    });
});

不确定如何/在何处使用USERNAME和PASSWORD

我尝试了其他选项，但出现错误400。不确定是否应该像这样使用主体...

任何帮助将不胜感激！