Http request from pulumi component

gistfile1.cs

using Pulumi;
using Microsoft.Azure.Management.AppService;
using Pulumi.AzureNative.Authorization;
using Microsoft.Rest;
using System.Threading.Tasks;
using Pulumi.AzureNative.Web;
using System.Net.Http;
using System;
using System.Text.Json;
using System.Text;

class FunctionAppKey : ComponentResource
{

    [Output]
    public Output<string> Key { get; set; }

    public FunctionAppKey(string name, FunctionAppKeyArgs args, ComponentResourceOptions? options = null)
        : base("newday:cardplatform:example:functionapp-key", name, args, options)
    {
        Key = Output.Tuple(args.Name, args.ResourceGroup, args.KeyName, args.KeyValue)
            .Apply(tuple =>
            {
                return CreateKey(tuple.Item1, tuple.Item2, tuple.Item3, tuple.Item4);
            });
    }

    private async Task<string> CreateKey(string functionAppName, string functionAppResourceGroup, string keyName, string keyValue)
    {
        var keys = await ListWebAppHostKeys.InvokeAsync(new ListWebAppHostKeysArgs
        {
            Name = functionAppName,
            ResourceGroupName = functionAppResourceGroup
        });

        var masterKey = keys.MasterKey;
        Console.WriteLine($"MasterKey: {masterKey}");

        var keydata = new
        {
            name = keyName,
            value = keyValue
        };
        Console.WriteLine($"got 1");

        var content = new StringContent(JsonSerializer.Serialize(keydata), Encoding.UTF8, "application/json");
        Console.WriteLine($"got 2");

        var httpClient = new HttpClient();
        Console.WriteLine($"got 3");
        httpClient.BaseAddress = new Uri($"https://{functionAppName}.azurewebsites.net");
        Console.WriteLine($"got 4");
        httpClient.DefaultRequestHeaders.Add("x-functions-key", masterKey);
        Console.WriteLine($"got 5");
        var response = await httpClient.PutAsync("/admin/host/keys", content);
        Console.WriteLine($"responseReason: {response.ReasonPhrase}");
        if (response.IsSuccessStatusCode)
        {
            Console.WriteLine($"got 6");

            this.Key = Output.Create(keyValue);
            return keyValue;
        }
        Console.WriteLine($"got 7");

        throw new ResourceException("Error adding the API Key", this);
    }
    public class FunctionAppKeyArgs : ResourceArgs
    {
        public Input<string> Name { get; set; }
        public Input<string> ResourceGroup { get; set; }
        public Input<string> KeyName { get; set; }
        public Input<string> KeyValue { get; set; }
    }
}