Spotify Apps API - Get ID of Collaborative Playlist User - spotify

Is it possible to get the userid of the person who added a track to a collaborative playlist within the Spotify Apps API?

In short — no. The Apps API exposes no usernames at all at this time.

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Does Instagram API support get followers list and more?

I am working on an app, which does the below:
A user logins using instagram User creates content and shares it with a subset of her instagram followers ( say 3 out of 200)
Those 3 users get a message in their insta inbox and can click on a link
and sign up on our app.
I am trying to find Insta API documentation, but I am unable to. Can someone experienced with Insta API's please guide to me to specific parts of the Instagram API documentation which can do What I am imagining?
Thanks
The thing that you are trying to create is not possible by using official Instagram APIs. None of the APIs returns the list of followers for given user. It is also not possible to send a Direct message via Instagram API.
https://developers.facebook.com/docs/instagram-api here is the introduction to Instagram Graph API. Right on the top of that page you will find possible use-case scenarios.
There is also more limited Basic Display API which documentation and possible use-cases you can find here: https://developers.facebook.com/docs/instagram-basic-display-api

Is it possible to get an artist's social media from Spotify API?

Is it possible to ge an artist's social media (like Twitter, Instagram) from Spotify API? Basically this question about Soundcloud
Based on the spotify documentation that is not possible. However, it appears that an artist social media is available under more info in the app so I guess the info is not exposed via the API. Have you considered using the social medias API instead to look for artists?

Get user ID - WebAPI Spotify (Spotipy)

my question
is possible get a user id in any way? I would search a user from his name and print his recently artist played
Thanks
This is not possible due to Spotify's Web API has no endpoint where you can fetch user ids by their names.
What you can do is creating an application where a specific user can login using Spotify. Afterwards you can use this endpoint in order to retrieve the recently played tracks of that exact user. The track object in the response will hold the artist as well.

Restrictions on accessing users public playlists

I am thinking of doing a web app that uses keywords to query Spotify web API for public user playlists, and then do an online mashup with my own music retrieval system. Is it allowed? Can the playlist names and tracks be cached for the purpose of categorization.
I read through the Terms of Use and saw this:
"Do not improperly access, alter or store the Spotify Service or Spotify Content, including (i) using any robot, spider, site search/retrieval application, or other tool to retrieve, duplicate, or index any portion of the Spotify Service or Spotify Content (which includes playlist data) or collect information about Spotify users for any unauthorized purpose;"
Paul Lamere does something similar with Playlist Miner: https://github.com/plamere/playlistminer. But he is an EchoNest employee.

Can I get likes by specific user using Instagram API?

Can I get likes by specific user using Instagram API? I saw this in Windows Phone app, but I can't find it in API docs.
Is it possible?
If I understand this correctly, you wish to get the most recently liked photos of a particular user.
This can be done using the Instagram API - but only when that particular user has authenticated your app.
You can use the following endpoint:
GET /users/self/media/liked
Here the API call would be :
https://api.instagram.com/v1/users/self/media/liked?access_token=ACCESS-TOKEN
This will give you the list of recent media liked by the owner of the ACCESS-TOKEN.
More details on the Instagram API here :
https://www.instagram.com/developer/endpoints/users/#get_users_feed_liked
Unfortunately no, you can't.
This feature is only available on the Instagram app following this steps
To view the 300 most-recent posts you've liked, go to your account
settings in the app and then tap Posts You've Liked. You won't be able
to view posts you've liked on the web.

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