facebook api图形不是搜索用户

我正在尝试查找用户,但它引发了身份验证错误

import requests
from urllib.parse import urlencode

token = 'my-token'
graph_url = 'https://graph.facebook.com/v3.2/search?'

params = {
    'q':'francisco',
    'type':'user',
    'method':'get',
    'format':'json',
    'access_token':token
}

url = graph_url+urlencode(params)

resp = requests.get(url)
print(resp.json())

错误:

{'error': {'message': 'Unsupported operation', 'type': 'OAuthException', 'code': 100, 'fbtrace_id': 'Dao1UbelGkF'}}

似乎有些事情我做得不好,或者不再允许搜索