Dim objClient As New HttpClient()

objClient.BaseAddress = New Uri("https://www.eventbriteapi.com/v3/")
objClient.DefaultRequestHeaders.Authorization = New AuthenticationHeaderValue("Bearer", "IODVRTRFJ5FVEXZXXXXX")

Dim objResponse As HttpResponseMessage = Await objClient.GetAsync("events/search?organizer.id=77181XXXXX")

If objResponse.IsSuccessStatusCode Then

    Dim strJSON As String = Await objResponse.Content.ReadAsStringAsync
    txtOutput.Text = strJSON

Else

    txtOutput.AppendText(objResponse.ToString + vbCrLf)
    txtOutput.AppendText(objResponse.RequestMessage.ToString + vbCrLf)

End If

objClient.Dispose()

Method: GET, RequestUri: 'https://www.eventbriteapi.com/events/search?organizer.id=77181XXXXX', Version: 1.1, Content: <null>, Headers:
{
  Authorization: Bearer IODVRTRFJ5FVEXZXXXXX
}

StatusCode: 401, ReasonPhrase: 'UNAUTHORIZED', Version: 1.1, Content: System.Net.Http.StreamContent, Headers:
{
  Transfer-Encoding: chunked
  Connection: keep-alive
  x-xss-protection: 1; mode=block
  x-content-type-options: nosniff
  Vary: Accept
  X-UA-Compatible: IE=edge
  X-Frame-Options: SAMEORIGIN
  Access-Control-Allow-Origin: *
  Access-Control-Allow-Headers: Authorization
  Date: Fri, 28 Nov 2014 14:32:02 GMT
  P3P: CP="NOI ADM DEV PSAi COM NAV OUR OTRo STP IND DEM"
  Set-Cookie: SS=AE3DLHTSIyq8Ey6stmsFe7sH0LwxwTjQNw; Domain=.eventbriteapi.com; httponly; Path=/; secure
  Set-Cookie: eblang=lo%3Den_US%26la%3Den-us; Domain=.eventbriteapi.com; expires=Sat, 28-Nov-2015 14:32:02 GMT; httponly; Path=/
  Set-Cookie: SP=AGQgbblV535q50zSGYa6PvdeMsiuIPDnFlsnyVrk5VIvAnFRtrUHh7AU791a46nkYXJQhH3_VZLFgHuw4j8sAYXPy3l6adKHpQ5js-vjoXyJpTp51nd4Ewnhd-lS9UlI2YL0rUaHCkLvt4_buXJOvRuN222hINBjvQBsJPrR9woApj_ic0MT0cJcNIDsY40PnEOhH8p2xijrXVZHQa6fjwemsjgJEu_Vn6NBi4UO9hBL7sLl-eetYyE; Domain=.eventbriteapi.com; httponly; Path=/
  Set-Cookie: G=v%3D1%26i%3D1429e3af-ac09-4b67-b2a3-1f4473c28bcd%26a%3D51b%26s%3DAPDvTK5mqMI40Xz80zXcPKvFx7daGz_DOA; Domain=.eventbriteapi.com; expires=Sat, 28-Nov-2015 14:32:02 GMT; httponly; Path=/
  Set-Cookie: AN=; expires=Thu, 01-Jan-1970 00:00:00 GMT; Max-Age=0; Path=/
  Server: nginx
  Allow: GET
  Allow: HEAD
  Allow: OPTIONS
  Content-Type: application/json
}