Facebook Graph API user_friends does not return friends list swift

I am trying to get our app approved for user_friends permission from Facebook. They asked to implement the feature and demonstrate how the usage will be implemented.

Here is what I did in code:

fileprivate func getFBFriends() {
    let params = ["fields": "id, first_name, last_name, name, email, picture, user_friends"]
    let graphRequest = GraphRequest(graphPath: "/me/friends", parameters: params)
    let connection = GraphRequestConnection()
    connection.add(graphRequest, completion: { (connection, result, error) in
        if error == nil {
            if let userData = result as? [String:Any] {
                print(userData)
            }
        } else {
            print("Error Getting Friends");
        }
        self.dispatchGroup.leave()
    })

    connection.start()
}

I am using test users created in Facebook developer portal.

My app is in live mode. I tried switching from live to development as well.

I added test users as friends and logged into app using facebook for all the users.

Response from Facebook Graph API Explorer:

{
  "data": [
  ],
  "summary": {
    "total_count": 3
  }
}

PS: I have already checked if I have AccessToken or not. The problem is, I get only the count but no friends. All posted answers for same question, didn’t solve my problem.