'Set the consumer_key and consumer_secret for this instance
Args:
consumer_key:
The consumer_key of the twitter account.
consumer_secret:
The consumer_secret for the twitter account.
access_token_key:
The oAuth access token key value you retrieved
from running get_access_token.py.
access_token_secret:
The oAuth access token\'s secret, also retrieved
from the get_access_token.py run.'

def SetCredentials(self, consumer_key, consumer_secret, access_token_key=None, access_token_secret=None):

    self._consumer_key = consumer_key
    self._consumer_secret = consumer_secret
    self._access_token_key = access_token_key
    self._access_token_secret = access_token_secret
    auth_list = [consumer_key, consumer_secret, access_token_key, access_token_secret]
    if all(auth_list):
        self.__auth = OAuth1(consumer_key, consumer_secret, access_token_key, access_token_secret)
    self._config = None
