Added OAuth2  and Basic Auth remained

To run it:

basic:
python  main.py  --company_name=your_company_name



oauth2:
python  main.py --client_secret=-fFg4O8Xq5KxVbNuskmtb6WE-wmjVh0vrrHfKqlIWJzLcg --client_id=WOhfRAOx4iTUgtlj9fh7rw --tokens_file_name=/Users/alex/Documents/projects/python/Harvest/tokens.json