docs: def execute_query(self, payload):
          '''Execute the query and returns and response'''
          if vars(self).get('oauth'):
              if not self.oauth.token_is_valid(): # Refresh token if token has expired
                  self.oauth.refresh_token()
              response = self.oauth.session.get(self.PRIVATE_URL, params= payload, header_auth=True)
          else:
              response = requests.get(self.PUBLIC_URL, params= payload)
  
          self._response = response # Saving last response object.
          return response