Fetching user follower/Friend list in twitter in android

android
api

#1

I have implemented twitter login using TwitterCore https://developer.twitter.com/en/docs/accounts-and-users/follow-search-get-users/api-reference/get-followers-list ; and when I am calling
https://api.twitter.com/1.1/friends/list.json?user_id=userId&screen_name=AppScreenName&cursor=-1
&skip_status=true&include_user_entities=false
to get list of followers but in response I am getting:

{“errors”:[{“code”:215,“message”:“Bad Authentication data.”}]}
So how can I fix this?