Using metadata to store Stripe and Keygen resource details to later use

example.cs

// Set your Stripe API key. Remember to change this to your live secret key in production.
//
// NEVER USE YOUR SECRET KEY IN CLIENT-SIDE CODE.
//
// See your keys here: https://dashboard.stripe.com/account/apikeys
StripeConfiguration.SetApiKey("YOUR_STRIPE_SECRET_KEY");

using RestSharp;
using System;
using System.Collections.Generic;
using Stripe;

public class Example
{
  // Set this to your Keygen account ID or slug.
  //
  // Available at: https://app.keygen.sh/settings
  const string KEYGEN_ACCOUNT_ID = "YOUR_KEYGEN_ACCOUNT_ID_HERE";

  // This is a Keygen token. If you're running code client-side, always use a *user* token. If
  // you're running code server-side, you can either use an admin token or a product token.
  //
  // NEVER HARDCODE YOUR ADMIN OR PRODUCT TOKEN IN CLIENT-SIDE CODE.
  // More security tips at: https://keygen.sh/docs/api#security
  //
  // Available at: https://app.keygen.sh/tokens
  const string KEYGEN_TOKEN = "YOUR_KEYGEN_TOKEN_HERE";
  
  public static void Main()
  {
    var keygen = new RestClient(string.Format("https://api.keygen.sh/v1/accounts/{0}", KEYGEN_ACCOUNT_ID));

    /*
     * Scenario #1: You have access to the MoonClerk/Stripe customer ID and want to retrieve
     *              the related Keygen user object.
     */
    {
      var STRIPE_CUSTOMER_ID = "A_STRIPE_CUSTOMER_ID"; // THIS IS THE CUSTOMER ID YOU HAVE ACCESS TO

      // Get the Stripe customer object
      var customerService = new StripeCustomerService();
      var customer = customerService.Get(STRIPE_CUSTOMER_ID);
      
      // Get the Keygen user using the ID stored in the Stripe customer's metadata
      var request = new RestRequest(string.Format("users/{0}", customer.Metadata["keygenUserId"]), Method.GET);
      request.AddHeader("Authorization", string.Format("Bearer {0}", KEYGEN_TOKEN));
      request.AddHeader("Accept", "application/vnd.api+json");

      var response = keygen.Execute<Dictionary<string, object>>(request).Data;
      if (response.ContainsKey("errors"))
      {
        Console.WriteLine("Failed to retrieve user: {0}", response["errors"]);
        return;
      }
      var user = (Dictionary<string, object>) response["data"];

      // … do something with the newly retrieved Keygen user
    }

    /*
     * Scenario #2: You have access to the Keygen user ID and want to retrieve the related
     *              MoonClerk/Stripe customer object.
     */
    {
      var KEYGEN_USER_ID = "A_KEYGEN_USER_ID"; // THIS IS THE USER ID YOU HAVE ACCESS TO

      // Get the Keygen user object
      var request = new RestRequest(string.Format("users/{0}", KEYGEN_USER_ID), Method.GET);
      request.AddHeader("Authorization", string.Format("Bearer {0}", KEYGEN_TOKEN));
      request.AddHeader("Accept", "application/vnd.api+json");

      var response = keygen.Execute<Dictionary<string, object>>(request).Data;
      if (response.ContainsKey("errors"))
      {
        Console.WriteLine("Failed to retrieve user: {0}", response["errors"]);
        return;
      }
      var user = (Dictionary<string, object>) response["data"];
      var attrs = (Dictionary<string, object>) user["attributes"];
      var meta = (Dictionary<string, object>) user["metadata"];

      // Get the Stripe customer using the ID stored in the Keygen user's metadata 
      var customerService = new StripeCustomerService();
      var customer = customerService.Get((string) meta["stripeCustomerId"]);

      // … do something with the newly retrieved Stripe customer
    }
  }
}