Get Security Groups

Function1.cs

using System;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Azure.WebJobs;
using Microsoft.Azure.WebJobs.Extensions.Http;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Logging;
using Microsoft.Graph;
using Microsoft.Identity.Client;
using Newtonsoft.Json.Linq;
using System.Collections.Generic;
using Microsoft.Graph.Auth;

namespace GetGroups
{
    public static class Function1
    {
        [FunctionName("Function1")]
        public static async Task<IActionResult> Run(
            [HttpTrigger(AuthorizationLevel.Anonymous, "get", Route = null)] HttpRequest req,
            ILogger log)
        {
            log.LogInformation("C# HTTP trigger function processed a request.");

            string objectId = req.Query["objectId"];

            IConfidentialClientApplication confidentialClientApplication = ConfidentialClientApplicationBuilder
                            .Create(Environment.GetEnvironmentVariable("ClientId"))
                            .WithTenantId(Environment.GetEnvironmentVariable("TenantId"))
                            .WithClientSecret(Environment.GetEnvironmentVariable("ClientSecret"))
                            .Build();

            ClientCredentialProvider authenticationProvider = new ClientCredentialProvider(confidentialClientApplication);
            GraphServiceClient client = new GraphServiceClient(authenticationProvider);

            log.LogInformation($"Object ID {objectId}");
            var groups = await client.Users[objectId].MemberOf.Request().GetAsync();
            List<string> results = new List<string>();
            foreach (var group in groups)
            {
                log.LogInformation($"Group {group.Id}");
                results.Add(group.Id);
            }
            JObject j = new JObject();
            j.Add("groups", JToken.FromObject(results));
            log.LogInformation(j.ToString());
            return new OkObjectResult(j);
        }
    }
}