Retrieve the Mxit user's full contact list
        User authentication required with the following scope: 'graph/read'

def get_contact_list(self, list_filter, skip=None, count=None, scope='graph/read'):
        """
        Retrieve the Mxit user's full contact list
        User authentication required with the following scope: 'graph/read'
        """
        params = {
            'filter': list_filter
        }
        if skip:
            params['skip'] = skip
        if count:
            params['count'] = count

        contact_list = _get(
            token=self.oauth.get_user_token(scope),
            uri='/user/socialgraph/contactlist?' + urllib.urlencode(params)
        )

        try:
            return json.loads(contact_list)
        except:
            raise MxitAPIException('Error parsing contact_list data')