Gets all surveys in account
        
        Args:
            None
            
        Returns:
            list: a list of all surveys

def get_surveys(self):
        """Gets all surveys in account
        
        Args:
            None
            
        Returns:
            list: a list of all surveys
        """
        payload = { 
            'Request': 'getSurveys',
            'Format': 'JSON'
            }
        r = self._session.get(QUALTRICS_URL, params=payload)
        output = r.json()
        return output['Result']['Surveys']