docs: def add_basic_auth(dolt, username, password):
      """
      Send basic auth username and password.
  
      Normally you can use httplib2.Http.add_credentials() to add username and password.
      However this has two disadvantages.
  
      1. Some poorly implemented APIs require basic auth but don't send a
         "401 Authorization Required". Httplib2 won't send basic auth unless the server
         responds this way (see http://code.google.com/p/httplib2/issues/detail?id=130)
      2. Doing a request just to get a "401 Authorization Required" header is a waste
         of time and bandwidth. If you know you need basic auth, you might as well
         send it right up front.
  
      By using `with_basic_auth`, the username and password will be sent proactively
      without waiting for a 401 header.
      """
      return dolt.with_headers(
          Authorization='Basic %s' % base64.b64encode('%s:%s' % (username, password)).strip()
      )