Add Deafult Request Headers to GraphQL Queries with HTTP Client

gistfile1.txt

public class ExampleController : Controller
    {

        private readonly HttpClient _httpClient;

        public ExampleController()
        {
            _httpClient = new HttpClient
            {
                BaseAddress = new Uri(_urlHelper.GraphQLUri)
            };
            _httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
            _httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("bearer", "jbkjsbkjbsdkbksbvksdvbjsvb");
        }

  [HttpPost]
  public async Task<IActionResult> Create(ExampleVM model)
  {
    
var query = new {

                Query = @"mutation quote($quote: QuoteInput!) {
                              quote(quote :$quote) {
                                id,
                                address,
                                message,
                                isActive,
                                dateCreated,
                                otherDetails,
                                brokerId,
                                brokerSlipPath,
                                nameOfProspectiveInsured,
                                isDeleted
                              }
                            }", 

                Variables = new
                {
                    quote = new
                    {
                        active = true,
                        slipFileExtension = ext,
                        slipBase64 = brokingSlipb64,
                        message = model.Message,
                        userId = SignedInDetail.GetUserId(),
                        quoteId = 0,
                        status = 1
                    }
                }
            };

             var json = JsonConvert.SerializeObject(query);
            var data = new StringContent(json, Encoding.UTF8, "application/json");

            var response = await _httpClient.PostAsync("", data);

  }

}