/// <summary>
        /// Initialize a new service instance from the specified OAuth client.
        /// </summary>
        /// <param name="client">The OAuth client.</param>
        public static InstagramService CreateFromOAuthClient(InstagramOAuthClient client) {

            // This should never be null
            if (client == null) throw new ArgumentNullException("client");

            // Initialize the service
            return new InstagramService {
                Client = client
            };

        }
 internal InstagramTagsRawEndpoint(InstagramOAuthClient client) {
     Client = client;
 }
        protected void Page_Load(object sender, EventArgs e) {

            Callback = Request.QueryString["callback"];
            ContentTypeAlias = Request.QueryString["contentTypeAlias"];
            PropertyAlias = Request.QueryString["propertyAlias"];

            if (AuthState != null) {
                string[] stateValue = Session["Skybrud.Social_" + AuthState] as string[];
                if (stateValue != null && stateValue.Length == 3) {
                    Callback = stateValue[0];
                    ContentTypeAlias = stateValue[1];
                    PropertyAlias = stateValue[2];
                }
            }

            // Get the prevalue options
            InstagramOAuthPreValueOptions options = InstagramOAuthPreValueOptions.Get(ContentTypeAlias, PropertyAlias);
            if (!options.IsValid) {
                Content.Text = "Hold on now! The options of the underlying prevalue editor isn't valid.";
                return;
            }

            // Configure the OAuth client based on the options of the prevalue options
            InstagramOAuthClient client = new InstagramOAuthClient {
                ClientId = options.ClientId,
                ClientSecret = options.ClientSecret,
                RedirectUri = options.RedirectUri
            };

            // Session expired?
            if (AuthState != null && Session["Skybrud.Social_" + AuthState] == null) {
                Content.Text = "<div class=\"error\">Session expired?</div>";
                return;
            }

            // Check whether an error response was received from Instagram
            if (AuthError != null) {
                Content.Text = "<div class=\"error\">Error: " + AuthErrorDescription + "</div>";
                return;
            }

            // Redirect the user to the Instagram login dialog
            if (AuthCode == null) {

                // Generate a new unique/random state
                string state = Guid.NewGuid().ToString();

                // Save the state in the current user session
                Session["Skybrud.Social_" + state] = new[] { Callback, ContentTypeAlias, PropertyAlias };

                // Construct the authorization URL
                string url = client.GetAuthorizationUrl(state);
                
                // Redirect the user
                Response.Redirect(url);
                return;
            
            }
            
            // Exchange the authorization code for an access token
            InstagramAccessTokenResponse accessToken;
            try {
                accessToken = client.GetAccessTokenFromAuthCode(AuthCode);
            } catch (Exception ex) {
                Content.Text = "<div class=\"error\"><b>Unable to acquire access token</b><br />" + ex.Message + "</div>";
                return;
            }

            try {

                // Initialize the Instagram service
                InstagramService service = InstagramService.CreateFromAccessToken(accessToken.Body.AccessToken);

                // Get information about the authenticated user
                InstagramUser user = service.Users.GetSelf().Body.Data;



                Content.Text += "<p>Hi <strong>" + (user.FullName ?? user.Username) + "</strong></p>";
                Content.Text += "<p>Please wait while you're being redirected...</p>";

                // Set the callback data
                InstagramOAuthData data = new InstagramOAuthData {
                    Id = user.Id,
                    Username = user.Username,
                    FullName = user.FullName,
                    Name = user.FullName ?? user.Username,
                    Avatar = user.ProfilePicture,
                    AccessToken = accessToken.Body.AccessToken
                };

                // Update the UI and close the popup window
                Page.ClientScript.RegisterClientScriptBlock(GetType(), "callback", String.Format(
                    "self.opener." + Callback + "({0}); window.close();",
                    data.Serialize()
                ), true);

            } catch (Exception ex) {
                Content.Text = "<div class=\"error\"><b>Unable to get user information</b><br />" + ex.Message + "</div>";
            }

        }
 internal InstagramLocationsRawEndpoint(InstagramOAuthClient client) {
     Client = client;
 }
 internal InstagramRelationshipsRawEndpoint(InstagramOAuthClient client) {
     Client = client;
 }
 internal InstagramMediaRawEndpoint(InstagramOAuthClient client) {
     Client = client;
 }