Need help with Django 2.0 + Facebook SDK

[avtrrr]

Hi there! Did not find any relevant topic for my problem.

The situation:

1. Developing Django-based web-application.
   
2. Authorization via Facebook using django-allauth - it is done, works well.
   
3. Need to view Facebook friends on the user's profile using Facebook OpenGraph API - the problem is here!
   

Code in views.py:

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import facebook
import requests
import json


@login_required
def user_friendlist(request):
    #Trying to get data from Facebook using OpenGraph API
    FB_APP_ID = {my_app_id}
    FB_APP_SECRET = {my_app_secret}

    try:
        r = requests.get(
            'https://graph.facebook.com/oauth/access_token?client_id='
            + FB_APP_ID + '&client_secret='
            + FB_APP_SECRET
            + '&grant_type=client_credentials')
        r_json = r.json()
        ACCESS_TOKEN = r_json['access_token']
        graph = facebook.GraphAPI(access_token = ACCESS_TOKEN)
        current_user = graph.get_object('me')
        friends = graph.get_connections(id = current_user['id'], connection_name = 'friends')
        
        #Friendlist
        friendlist = []
        friends['data'][0]['name']
        for friend in friends['data']:
            friendlist.append(friend['name'])

    except Exception:
        friendlist = "Importing friendlist failed!"

    return render(
        request, 'users/user_profile.html',
        {'friendlist': friendlist}
        )

I understand that smth is wrong with user access token. It seems to be a simple question but I`m frozen.
I read Facebook SDK docs and OpenGraph API docs but can`t understand wtf.

How can I handle the issue?