How to call API/Method into selenium Test for verification

I did do my best to erase the sensitive information but if someone see's any please help me erase it thanks.I have written a program in which I am getting the information about an entity from/with API and than need to verify it against the website. My code is as follow.

namespace authtest
{
class Program
{
    static async Task Main(string[] args)
    {
        Console.WriteLine("MY API");
        AccessToken token = GetToken().Result;
        Console.WriteLine(String.Format("Access Token: {0}", token.access_token));
        Console.WriteLine("Got the token");
        Console.Write("Enter P");
        string Id = Console.ReadLine();
        Rootobject RespObjFromAPI = await CallAPI(token,Id);
        Console.ReadLine();
    }
     public  static async Task<Rootobject> CallAPI(AccessToken J, string id)
    {
        var client = new RestSharp.RestClient("URL");
        var request = new RestSharp.RestRequest("code", RestSharp.Method.GET);
         request.AddParameter("P", id);
         request.AddParameter("Authorization", "Bearer " + J.access_token, ParameterType.HttpHeader);
         RestSharp.IRestResponse resp = client.Execute(request);
        string JsonText = resp.Content.ToString();
        Rootobject myobj = JsonConvert.DeserializeObject<Rootobject>(JsonText);
        CodeResults P = myobj.lookup[0].codeResults;
       foreach(Code x in P.Code2)
        {
            Console.WriteLine(x.VALUE TO BE VERIFIED);
        }
        return myobj;
    }
    public  static async Task<AccessToken> GetToken()
    {
        Console.WriteLine("getting TOken");
        string clientId = "MY CLIENT ID";
        string clientSecret = "MY CLIENT SECRET";
        string credentials = String.Format("{0}:{1}", clientId, clientSecret);
        using (var client = new HttpClient())
        {
            client.DefaultRequestHeaders.Accept.Clear();
            client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
            client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic", Convert.ToBase64String(Encoding.UTF8.GetBytes(credentials)));
            List<KeyValuePair<string, string>> requestData = new List<KeyValuePair<string, string>>();
            requestData.Add(new KeyValuePair<string, string>("grant_type", "client_credentials"));
            FormUrlEncodedContent requestBody = new FormUrlEncodedContent(requestData);
            var request = await client.PostAsync("Auth URL", requestBody);
            var response = await request.Content.ReadAsStringAsync();
            return JsonConvert.DeserializeObject<AccessToken>(response);
         }
     }
  }
 }

Above Written API code works perfectly as long i am running it separately, Following is my Selenium Code,

  namespace Selenium
    {
   [TestClass]
    public class UnitTest1
   {
    static IWebDriver driver;

    [TestMethod]
    public void A_VerifyHeader()
    {
        var verifycode = driver.FindElement(By.XPath("tag value to be verified against api data")).Text;


        Task<TestResult> task = Program.CallAPI();
        task.Wait();
        Assert.AreEqual(task, verifycode);
    }
    [AssemblyCleanup]
    public static void Cleanup()
    {
        driver.Quit();
    }
    [AssemblyInitialize]
    public static void Setup(TestContext context)
    {
        driver = new ChromeDriver();
        driver.Navigate().GoToUrl("website URL");
        driver.Manage().Window.Maximize();
        driver.Manage().Timeouts().ImplicitWait = TimeSpan.FromSeconds(30);

    }
   }
 }

IF i run it without the Calling the task in the selenium test i can find the tag and all, BUt when I try to call Task task = Program.CallAPI() i get errors I also tried calling Task task = Program.CallAPI(AccessToken J, string id). I have tried different things trying to achieve this but no success.