code: def unsubscribe(self, user, verbose=None):
          
          if not self.email_enabled:
              raise EmailNotEnabledError("See settings.EMAIL_ENABLED")
          response = requests.put(
              f"{self.api_url}/{self.address}/members/{user.email}",
              auth=("api", self.api_key),
              data={"subscribed": False},
          )
          if verbose:
              sys.stdout.write(
                  f"Unsubscribing {user.email} from {self.address}. "
                  f"Got response={response.status_code}.\n"
              )
          return response
docs: Returns a response after attempting to unsubscribe
          a member from the list.