code: def get(self, dash_id):
          
          data = json.loads(r_db.hmget(config.DASH_CONTENT_KEY, dash_id)[0])
          return build_response(dict(data=data, code=200))
docs: Read dashboard content.
  
          Args:
              dash_id: dashboard id.
  
          Returns:
              A dict containing the content of that dashboard, not include the meta info.