Facebook Graph API Read Followers Count
If you have an access_token, you can call {profile-id}/insights/page_fans_country and retrieve the number of people who like the page aggregated by country. This works for any public profile.
https://graph.facebook.com/{profile-id}/insights/page_fans_country?access_token={access-token}
You could then sum up the countries to get the total number of followers. If you need to retrieve followers for your own profile, you can call page_fans which provides the total number of people who have liked your page.
You can use fan_count:
{
"id": "235014179868339",
"name": "Zoella",
"fan_count": 2647287
}
Facebook Graph API Explorer
According to the docs, there is no possibility to get the follower count: https://developers.facebook.com/docs/graph-api/reference/user
The subscribers endpoint was removed with v2.0 already: https://developers.facebook.com/docs/apps/changelog#v2_0
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