code: def quitter():
      
      unique_id = request.form['uniqueId']
      if unique_id[:5] == "debug":
          debug_mode = True
      else:
          debug_mode = False
  
      if debug_mode:
          resp = {"status": "didn't mark as quitter since this is debugging"}
          return jsonify(**resp)
      else:
          try:
              unique_id = request.form['uniqueId']
              app.logger.info("Marking quitter %s" % unique_id)
              user = Participant.query.\
                  filter(Participant.uniqueid == unique_id).\
                  one()
              user.status = QUITEARLY
              db_session.add(user)
              db_session.commit()
          except exc.SQLAlchemyError:
              raise ExperimentError('tried_to_quit')
          else:
              resp = {"status": "marked as quitter"}
              return jsonify(**resp)
docs: Mark quitter as such.