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: remove_member.rb
    path of file: ./repos/Twitter-API-v2-sample-code/Manage-Lists/Manage-List-Members
    
    the code of the file until where you have to start completion: # This script implements the PIN-based OAuth flow to obtain access tokens for a user context request
require 'oauth'
req
    
def obtain_access_token(consumer, request_token, pin)
	token = request_token.token
	token_secret = request_token.secret
	hash = { :oauth_token => token, :oauth_token_secret => token_secret }
	request_token  = OAuth::RequestToken.from_hash(consumer, hash)

	# Get access token
	access_token = request_token.get_access_token({:oauth_verifier => pin})

	return access_token
end