Azure Function - Retrieves from Azure Bus Queue and insert into Db

#r "System.Data"
#r "Newtonsoft.Json"

using System;
using System.Net;
using System.Threading.Tasks;
using System.Configuration;
using System.Text;
using System.Data;
using System.Data.SqlClient;
using Newtonsoft.Json;


public static void Run(string myQueueItem, TraceWriter log)
{
     var cnnString  = ConfigurationManager.ConnectionStrings["SqlConnection"].ConnectionString;
     var query ="INSERT INTO dbo.Users (Id, Username, Password) " + 
         "VALUES (@Id, @Username, @Password) ";

    var user = JsonConvert.DeserializeObject<User>(myQueueItem);


    using(SqlConnection cn = new SqlConnection(cnnString))
    using(SqlCommand cmd = new SqlCommand(query, cn))
    {
        // define parameters and their values
        cmd.Parameters.Add("@Id", SqlDbType.UniqueIdentifier).Value = user.Id;
        cmd.Parameters.Add("@Username", SqlDbType.VarChar, 50).Value = user.Username;
        cmd.Parameters.Add("@Password", SqlDbType.VarChar, 50).Value = user.Password;

        // open connection, execute INSERT, close connection
        cn.Open();
        cmd.ExecuteNonQuery();
        cn.Close();
    }
}

public class User
{
    public Guid Id { get; set; }
    public string Username { get; set; }
    public string Password { get; set; }
}