Example console application that downloads leads from vslweb and dumps it to the console

Program.cs

using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using System;
using System.Net.Http;
using System.Text;

namespace VSL.Examples
{
    public class Program
    {
        public static void Main(string[] args)
        {
            var client = new AuthorizedHttpClient(username: "a@b.com", password: "xyz");

            // request leads for 
            var storage = "vsl";
            var tenant = "vsl";
            var from = "20170401"; // YYYYMMDD
            var to = "20170430"; // YYYYMMDD

            var url =
                "https://api.virtualsaleslab.com/r/" +
                storage + "/" + tenant +
                "/nl/reporting/data/details?From=" +
                from + "&To=" + to;

            var json = client.GetStringAsync(url).Result;

            Console.WriteLine(json);
            Console.ReadKey();
        }

        /// <summary>
        /// A http client where the default headers contain the necessary JSON Web token (JWT) in the header.
        /// </summary>
        public class AuthorizedHttpClient : HttpClient
        {
            public AuthorizedHttpClient(string username, string password)
            {
                // always accept JSON format
                base.DefaultRequestHeaders.Add("Accept", "application/json");

                var tokenRequestUrl = "https://virtualsaleslab.eu.auth0.com/oauth/ro";

                var tokenRequestJSON = JsonConvert.SerializeObject(new
                {
                    client_id = "2NGDZHG76TdaNxeupbPZhU4HgPTDBmO0",
                    username = username,
                    password = password,
                    connection = "Username-Password-Authentication",
                    scope = "openid app_metadata"
                });

                var tokenRequestContent = new StringContent(tokenRequestJSON, Encoding.UTF8, "application/json");

                // request a JWT (JSON Web Token)
                var tokenResponseMessage = base.PostAsync(tokenRequestUrl, tokenRequestContent).Result;

                // parse the json response text
                string tokenResponseText = tokenResponseMessage.Content.ReadAsStringAsync().Result;
                var tokenResponse = JObject.Parse(tokenResponseText);

                // extract the token from the response
                var jwtToken = tokenResponse["id_token"].ToString(); ;

                // add the authorization header with the token to the default request headers
                base.DefaultRequestHeaders.Add("Authorization", "Bearer " + jwtToken);
            }
        }
    }
}

program.sh

#!/bin/bash

username="a@b.com"
password="pwd"
storage="vsl"
tenant="vsl"
from="20170401"
to="20170430"

data='{"client_id":"2NGDZHG76TdaNxeupbPZhU4HgPTDBmO0", "username":"'
data=$data$username'", "password":"'
data=$data$password'", "connection":"Username-Password-Authentication", "scope":"openid app_metadata"}'

token=$(curl \
  --request POST \
  --url 'https://virtualsaleslab.eu.auth0.com/oauth/ro' \
  --header 'content-type: application/json' \
  --data "$data" \
  | grep -Po '"id_token":"[^\"]*' \
  | grep -Po '[^\"]*$' )

authheader="Authorization: Bearer $token"
url="https://api.virtualsaleslab.com/r/$storage/$tenant/nl/reporting/data/details?From=$from&To=$to"
  
curl -H "$authheader" "$url"