using System;

using System.Text;

​

public class Program

{

    public static void Main()

    {

    var user = "ops.core:3AE4978CC6DAEB54C8EBD568CE598";

    var token = Convert.ToBase64String(Encoding.ASCII.GetBytes(user));

    Console.WriteLine("hola");

    Console.WriteLine(token);

    }

}