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Trying to create a POST request with Apache

I have tried many different ways to do this with apache but the server seems to not be receiving the data. Stacktraces are not being printed so I can only assume I have the request set up wrong for the server to receive the data. My current code looks like this:

    try {
        fixUntrustCertificate();
        url = new URL("https://panel.<address>.com/api/v1/server/send_command? 
        token=" + apikey + "&id=6");
        CloseableHttpClient client = HttpClients.createDefault();

        //POST to be executed
        HttpPost post = new HttpPost("https://panel. 
        <address>.com/api/v1/server/send_command?token=" + apikey + "&id=6");


        //data to send in POST
        List<BasicNameValuePair> params = new ArrayList<BasicNameValuePair>();
        params.add(new BasicNameValuePair("command", command)); 
        //command is a console command such as "ping", which would warrant 
        "pong" in response from the server.


        //Headers
        post.setHeader("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; 
        x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.192 
        Safari/537.36");
        post.setHeader("Accept", "text/html");
        post.setHeader("Host", "panel.<address>.com");
        post.setHeader("Content-Type", "multipart/form-data");

        //Entity to send
        post.setEntity(new UrlEncodedFormEntity(params));

        //POST execution
        client.execute(post);
        client.close();
    
    } catch (MalformedURLException e) {
	    String stack = ExceptionUtils.getStackTrace(e);
	    stackTrace = stack;
    } catch (IOException e) {
	    String stack = ExceptionUtils.getStackTrace(e);
	    stackTrace = stack;
    } catch (JSONException e) {
	    String stack = ExceptionUtils.getStackTrace(e);
	    stackTrace = stack;
    } catch (NoSuchAlgorithmException e) {
            String stack = ExceptionUtils.getStackTrace(e);
	    stackTrace = stack;
    } catch (KeyManagementException e) {
	    String stack = ExceptionUtils.getStackTrace(e);
	    stackTrace = stack;
    }