Enabling Instagram Chat API - instagram

I want to enable users of my app to message other Instagram users and also the app to send notifications to Instagram users.
Where can I find the API calls used my Instagram apps like InstaDM and Instachat which enables users to message/chat other Instagram users?
The API Console doesn't show any messaging/posting functions (unlike Twitter & Facebook)
http://instagram.com/developer/api-console/

Instagram doesn't support chat on its API :(

Related

Google Calendar API FreeBusy External Users

Is it possible to use oauth2 to access the Google calendar of several Google account users external from any user running my app? Can I run the free-busy API call to find out when the external users are available? If possible, do all external users in this call have to be in the same organization? To identify the users, do I need their email addresses? Can I write this in Node.js to run on a server? How can I grant access to the Node.js application running the free-busy query for all the external users being queried?
You can use Google Identity services to call the API and get the necessary token to access the Google Calendar for web applications, either user "Sign-in with Google" or "One tab."
Both options can be used on Mobile devices and web applications.
You can find more information about the authentication with calendar data API in this documentation or more information about the OAuth client library for Node.js here.

Request Instagram app to authenticate our website users

We have implemented Instagram Login in our site and it is working ok. The issue is that our users have the Instagram app installed in their phones and they are logged in there. But when they try to login into our website using Instagram Login the API opens a webpage asking them to login to Instagram and after that, they will be correctly logged into our app.
Is there a way we can ask the Instagram API to use the Instagram app to authenticate our users?

Instagram Graph API Webhooks on behalf of another user

I'm trying to figure out how to use the Instagram Graph API Webhooks on behalf of another user. The documentation is very vague about this, and it seems to me that all I can do is get data from my account account. Is that correct?
We have a reviewed app (the new Instagram Graph API) so users can authenticate them selves in our app, which allows us to get insights data from their Instagram Business Accounts on their behalf.
According to the documentation it seems that each user that wants insights for when their stories expire for example, need to set up an app and configure the webhooks themselves. Shouldn't it be enough that we do this and then setup subscriptions based on the users that have allowed us to pull their data from their accounts?

Does Spotify Web API store user email and details of those who authorized?

I have created a Web application that makes use of the Spotify Web API. Through the spotify Web API, I get the user's email (which they used to register their spotify account) after they authorize my app on their end. However, I don't store their emails in any database after they authorize. Is there a way I can retrieve the email list of all the users who authorized my app so far from my Spotify app interface?

Linking Foursquare and Facebook accounts programmatically?

I am working on iOS / php / MySQL application, which uses Foursquare API, in order to post check-ins to Foursquare. I would also like to post these Foursquare check-ins to Facebook Timeline map. Is there a way to programmatically connect user's Facebook account with their Foursquare account, and grant them Foursquare permission to post to Facebook wall? I want to do it on the Settings page of my app.
The user will need to grant Foursquare access to their Facebook account, which only the user can do. You can link the user to their settings page where they can elect to connect Facebook to their Foursquare account.

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