Invoiced C#.NET Single Sign-On Example

SSO.cs

using Jose.JWT;
using System;
using System.Text;

public class SSO
{
	public static void Main()
    {
        // Depends on this JWT library: https://github.com/dvsekhvalnov/jose-jwt

        // The SSO key can be obtained from Invoiced
        // in the dashboard by going to Settings > Developers
        const string ssoKey = "{INVOICED_SSO_KEY}";
        const string invoicedUsername = "yourcompany";

        // Here you would supply the customer ID on Invoiced.
        // https://invoiced.com/docs/api/#customers
        int invoicedCustomerId = 1234;

        // Build the SSO token using JWT
        DateTimeOffset dto = new DateTimeOffset(1970, 1, 1, 0, 0, 0, TimeSpan.Zero);
        int exp = dto.ToUnixTimeSeconds() + 86400; // link expires in 1 day

        var payload = new Dictionary<string, object>() 
        {
            { "sub", invoicedCustomerId },
            { "iss", ".NET Backend" },
            { "exp", exp }
        };

        var secretKey = Encoding.ASCII.GetBytes(ssoKey);
        string token = JWT.Encode(payload, secretKey, JwsAlgorithm.HS256);

        // Now you can redirect the user to this URL to jump into
        // your billing portal signed in as the given customer ID
        string url = "https://" + invoicedUsername + ".invoiced.com/login/" + token;

        // Will produce URLs that look like this:
        // https://yourcompany.invoiced.com/login/eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJzdWIiOjEyMzQsImlzcyI6IlJ1YnkgQmFja2VuZCIsImV4cCI6MTQ1NTY1MjIxMH0.7kClQ2UAVEZ7xYus7ZHGRePnzDG5mBrcgIo6rZuo-Dw
        Console.WriteLine("SSO URL for customer ID {0}: {1}", invoicedCustomerId, url);
    }
}