code: def _store(self, uid, content, data=None):
          
          doc = dict(uid=uid)
          if data:
              gfs = gridfs.GridFS(self.db)
              id = gfs.put(data, encoding='utf-8')
              doc.update(data_id=id)
          doc.update(content)
          self.db.pastes.insert_one(doc)
docs: Store the given dict of content at uid. Nothing returned.