using System;

using System.IdentityModel.Tokens.Jwt;

using System.Security.Claims;

using Microsoft.IdentityModel.Tokens;

using Newtonsoft.Json;

public class Program

{

    public static void Main()

    {

        var jwtcs = "2FXpEEzJ0TNIjr3J/RK/yYXH4oIK0dstzM4FtDmoChsa+J6OWI5r9s8ieReL1sFr6QpZUewGjU/WPzVNmRP0Yw==";

        var ci = "iam";

        var secret = Convert.FromBase64String(jwtcs);

        var signingCredentials =

            new SigningCredentials(new SymmetricSecurityKey(secret), SecurityAlgorithms.HmacSha256Signature);

​

        var now = DateTime.UtcNow;

​

        var tokenHandler = new JwtSecurityTokenHandler();

​

        var token = tokenHandler.CreateToken(new SecurityTokenDescriptor

        {

         Subject = new ClaimsIdentity(new[]

            {

              new Claim("sub", "multiservice11@saltsys.com"),

              new Claim("account_id", "e9a7dad6-3bb1-4b19-981f-0e29fdad914f"),

              new Claim("nis_user_id", "6172"),

              new Claim("roles", JsonConvert.SerializeObject(new string[] { "customer" }), JsonClaimValueTypes.JsonArray)

            }),

         Issuer = ci,

         NotBefore = now,

         Expires = now.AddHours(7),

         IssuedAt = now,

         SigningCredentials = signingCredentials

        });

        Console.WriteLine(tokenHandler.WriteToken(token));

    }

}