using System;
using System.Threading.Tasks;
using Client = Sms77.Api.Client;

class Program
{
    static async Task Main()
    {
        var apiKey = Environment.GetEnvironmentVariable("SMS77_API_KEY");
        var client = new Client(apiKey);
        var balance = await client.Balance();
        Console.WriteLine($"Current account balance: {balance}");
    }
}