code: def score(self, experiment_name):
          
          if self._backend.get_variant(self.identity, experiment_name) and \
                  self.human is True:
              self._backend.mark_conversion(
                  experiment_name,
                  self._backend.get_variant(self.identity, experiment_name)
              )
docs: Used to mark the current user's experiment variant as "converted" e.g.,
  
          "Suzy, who was shown the large button, just signed up."
  
          Conversions will *only* be marked for visitors who have been verified
          as humans (to avoid skewing reports with requests from bots and web
          crawlers).
  
          :param experiment_name the string name of the experiment