code: def fetch(self):
          
          LOG.info('Checking inputs...')
          valid_inputs = self._check_inputs()
  
          if valid_inputs:
              LOG.info('Submitting request to {}'.format(self._url))
              self._submit_request()
              if self._failed:
                  return
  
              LOG.info('Parsing the response and formatting the results...')
              self._parse_and_format()
              return self.zpt_table
  
          LOG.error('Please fix the incorrect input(s)')
docs: Submit the request to the ACS Zeropoints Calculator.
  
          This method will:
  
          * submit the request
          * parse the response
          * format the results into a table with the correct units
  
          Returns
          -------
          tab : `astropy.table.QTable` or `None`
              If the request was successful, returns a table; otherwise, `None`.