You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: list-member-lookup.rb
    path of file: ./repos/Twitter-API-v2-sample-code/List-lookup/List-members-lookup
    
    the code of the file until where you have to start completion: # This script uses your bearer token to authenticate and retrieve members of a List specified by List ID

require 'json'
require 'typhoeus'

# The code below sets the bearer token 
    
def lists(url, bearer_token, params)
  options = {
    method: 'get',
    headers: {
      "User-Agent": "v2ListMembersLookupRuby",
      "Authorization": "Bearer #{bearer_token}"
    },
    params: params
  }

  request = Typhoeus::Request.new(url, options)
  response = request.run

  return response
end