Sitefinity Web API Authentication

authenticate.cs

private async void AuthenticateAndTest(object sender, RoutedEventArgs e)
{
    var token = await this.GetAuthorizationToken();
    var jsonResponse = await this.CallSitefinityService(token);
}

private async Task<string> GetAuthorizationToken()
{
    var requestBody = new FormUrlEncodedContent(new[] {
        new KeyValuePair<string, string>("wrap_name", "test"),
        new KeyValuePair<string, string>("wrap_password", "12345678")
    });

    var client = new HttpClient();
    client.BaseAddress = new Uri("http://localhost:50000");
    var loginResult = await client.PostAsync("/Sitefinity/Authenticate/SWT", requestBody);
    var responseText = await loginResult.Content.ReadAsStringAsync();

    var token = this.GetAuthenticationToken(responseText);

    return token;
}

private string GetAuthenticationToken(string authenticationResponse)
{
    var responseParameters = System.Web.HttpUtility.ParseQueryString(authenticationResponse);
    var token = responseParameters["wrap_access_token"];

    return token;
}

private async Task<string> CallSitefinityService(string token)
{
    var httpClient = new HttpClient();
    httpClient.BaseAddress = new Uri("http://localhost:50000/");
    var request = new HttpRequestMessage(HttpMethod.Get, "Sitefinity/Services/Content/ImageService.svc");
    request.Headers.Add("Authorization", $"WRAP access_token=\"{token}\"");

    var serviceResult = await httpClient.SendAsync(request);
    var jsonResult = await serviceResult.Content.ReadAsStringAsync();

    return jsonResult;
}