docs: def authorize():
      """Authorize to twitter.
  
      Use PIN authentification.
  
      :returns: Token for authentificate with Twitter.
      :rtype: :class:`autotweet.twitter.OAuthToken`
  
      """
      auth = tweepy.OAuthHandler(CONSUMER_KEY, CONSUMER_SECRET)
      url = auth.get_authorization_url()
      print('Open this url on your webbrowser: {0}'.format(url))
      webbrowser.open(url)
      pin = input('Input verification number here: ').strip()
  
      token_key, token_secret = auth.get_access_token(verifier=pin)
  
      return OAuthToken(token_key, token_secret)