Gemini Sample Connection in Java using Closeable HTTP

ArbBot.java

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package com.dotcomculture.arbbot;

import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.CloseableHttpResponse;

public class ArbBot {
    
    public static void main(String [ ] args)throws Exception{
    System.out.println("I am in main" );
    CloseableHttpClient httpClient = HttpClients.createDefault();
    HttpPost httpPost = new HttpPost("https://api.sandbox.gemini.com/v1/balances");
    httpPost.setHeader("Content-type", "text/plain");
    //httpPost.setHeader("Content-Length", "0");
    httpPost.setHeader("X-GEMINI-APIKEY", "Your API Key Here");
    httpPost.setHeader("X-GEMINI-PAYLOAD", "Gemini Payload here");
    httpPost.setHeader("X-GEMINI-SIGNATURE", "Gemini Signature here");
    httpPost.setHeader("Cache-Control", "0");
    CloseableHttpResponse closeableHttpResponse = httpClient.execute(httpPost);
    int statusCode = closeableHttpResponse.getStatusLine().getStatusCode();
    System.out.println("Status Code : " +statusCode );
    
    }
    
}

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.dotcomculture</groupId>
    <artifactId>ArbBot</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>
     <dependencies>
        <!-- https://mvnrepository.com/artifact/org.apache.httpcomponents/httpclient -->
<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpclient</artifactId>
    <version>4.5.5</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.httpcomponents/httpcore -->
<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpcore</artifactId>
    <version>4.4.9</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.json/json -->
<dependency>
    <groupId>org.json</groupId>
    <artifactId>json</artifactId>
    <version>20180130</version>
</dependency>
</dependencies>
</project>