I'm unable to create a user registration using the .NET client libraries: https://fusionauth.io/docs/v1/tech/client-libraries/netcore

I have verified that the API key is basically a super user. I've verified that I'm sending the registration object. I've tried twiddling different properties (verified, insertInstant) and made sure that the application exists. I've added the a user registration to the application manually and it works. Creating a user and setting the userdata works just fine. It just seems like the registration isn't working.

I looked in https://github.com/FusionAuth/fusionauth-netcore-client/issues and https://github.com/FusionAuth/fusionauth-issues/issues but didn't see any relevant issues.

Here's my code so far (you can run it with fusionauth_api_key=<key> dotnet.exe run -- foo@foo5.com bluepass123 blue)

$ cat usermanager.csproj
<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>netcoreapp3.1</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="FusionAuth.Client" Version="1.15.7" />
    <PackageReference Include="JSON.Net" Version="1.0.18" />
  </ItemGroup>

</Project>

$ cat Program.cs
using System;
using io.fusionauth;
using io.fusionauth.domain;
using io.fusionauth.domain.api;
using System.Collections.Generic;
using Newtonsoft.Json;

namespace usermanager
{
    class Program
    {
        private static readonly string apiKey = Environment.GetEnvironmentVariable("fusionauth_api_key");
        private static readonly string fusionauthURL = "http://localhost:9011";

        private static readonly string tenantId = "66636432-3932-3836-6630-656464383862";
        static void Main(string[] args)
        {
            if (args.Length != 3) {
                Console.WriteLine("Please provide email, password and favorite color.");
                Environment.Exit(1);
            }
            string email= args[0];
            string password = args[1];
            string favoriteColor = args[2];

            FusionAuthSyncClient client = new FusionAuthSyncClient(apiKey, fusionauthURL, tenantId);
            User userToCreate = new User();
            userToCreate.email = email;
            userToCreate.password = password;
            Dictionary<string, object> data = new Dictionary<string, object>();
            data.Add("favoriteColor", favoriteColor);
            userToCreate.data = data;
            UserRegistration registration = new UserRegistration();
            registration.applicationId = Guid.Parse("4243b56f-0b45-4882-aa23-ac75eea22d22");
            registration.verified = true;

            registration.insertInstant = DateTimeOffset.UtcNow;
            var registrations = new List<UserRegistration>();
            registrations.Add(registration);

            userToCreate.registrations = registrations;

            UserRequest userRequest = new UserRequest();
            userRequest.sendSetPasswordEmail = false;
            userRequest.user = userToCreate;
            string u = JsonConvert.SerializeObject(userRequest);
            Console.WriteLine(u);
            var response = client.CreateUser(null, userRequest);
            string json = JsonConvert.SerializeObject(response);
            Console.WriteLine(json);

            if (response.WasSuccessful())
            {
                var user = response.successResponse.user;
                Console.WriteLine("retrieved user with email: "+user.email);
            }
            else if (response.statusCode != 200)
            {
                var statusCode = response.statusCode;
                Console.WriteLine("failed with status "+statusCode);
            }
        }
    }
}