def get_auth(self, screen_name = None):
    if screen_name:
      if screen_name in self.tokens:
        return self.tokens[screen_name]
      else:
        raise Exception("Screen name not found in access token file")
    elif len(self.tokens) > 0:
      screen_name = self.tokens.keys()[0]
      return self.tokens[screen_name]
    else:
      raise Exception("No access tokens available")
Gives the authentication parameters needed to create a connnection object.
dataset/ETHPy150Open domrout/python-twitter-wrapper/twitterwrapper/access_tokens.py/AccessTokenStore.get_auth