membersShow method
Check if the specified user is a member of the specified list.
listId The numerical id of the list.
slug You can identify a list by its slug instead of its numerical id.
If you decide to do so, note that you'll also have to specify the list
owner using the ownerId or ownerScreenName parameters.
userId The ID of the user for whom to return results.
screenName The screen name of the user for whom to return results.
ownerId The user ID of the user who owns the list being requested by
a slug.
includeEntities The entities node will not be included when set to
false.
skipStatus When set to true statuses will not be included in the
returned user objects.
tweetMode When set to extended, uses the extended Tweets.
See https://developer.twitter.com/en/docs/tweets/data-dictionary/overview/intro-to-tweet-json#extendedtweet.
transform Can be used to parse the request. By default, the response is
parsed in an isolate.
Implementation
Future<User> membersShow({
  String? listId,
  String? slug,
  String? userId,
  String? screenName,
  String? ownerScreenName,
  String? ownerId,
  bool? includeEntities,
  bool? skipStatus,
  String tweetMode = 'extended',
  TransformResponse<User> transform = defaultUserTransform,
}) async {
  final params = <String, String>{}
    ..addParameter('list_id', listId)
    ..addParameter('slug', slug)
    ..addParameter('user_id', userId)
    ..addParameter('screen_name', screenName)
    ..addParameter('owner_screen_name', ownerScreenName)
    ..addParameter('owner_id', ownerId)
    ..addParameter('include_entities', includeEntities)
    ..addParameter('skip_status', skipStatus)
    ..addParameter('tweet_mode', tweetMode);
  return client
      .get(
        Uri.https('api.twitter.com', '1.1/lists/members/show.json', params),
      )
      .then(transform);
}