code: def fetch_by_code(self, code):
          
          code_data = self.read(code)
  
          if code_data is None:
              raise AuthCodeNotFound
  
          return AuthorizationCode(**code_data)
docs: Returns data belonging to an authorization code from redis or
          ``None`` if no data was found.
  
          See :class:`oauth2.store.AuthCodeStore`.