Who is 'user' in Instagram Stories API

Question

I'm writing an web app which uses Instagram Graph API for Stories . This is my preparation.

• I'm an admin ME of a Facebook page FB
• I have an Instagram account IG , which I convert to a business account and then link to the Facebook page FB .

Then I follow through the instructions on how to use Instagram Graph API.

• I made a Facebook login page for my app APP , as explained here .
• It works fine: I can login with my admin ID/PW for ME , and my app returns an access token .

Now, the next step is to invoke stories edge to extract the stories in an Instagram account IG . According to the documentation,

To get all of an Instagram Business Account's stories, send a GET request to the /user/stories edge; for example,
GET graph.facebook.com /17841405822304914/stories

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Question: Who is the user in the /user/stories edge?

I naturally assume that it's my admin ID ME for the Facebook page FB because this page is linked to my target IG account IG . But when I tried to invoke /user/stories edge, I got an error.

{
  "error":{
    "message":"(#100) Tried accessing nonexisting field (stories) on node type (User)",
    "type":"OAuthException",
    "code":100,
    "fbtrace_id":"FaeAydt7\/rd"
  }
}

Answer 1

You first GET me/accounts -> Submit

you should see your accounts, pick the one and click on account'd id

then add instagram_business_account as selected field -> Submit

you should see instagram account's id returned, click on it

GET /{instagra_business_account_id}/stories -> Submit