code: def encode_id_token(self, id_token):
          
  
          # Encode the ID token using the `client_secret`.
          #
          # TODO: Using the `client_secret` is not ideal, since it is transmitted
          # over the wire in some authentication flows.  A better alternative is
          # to use the public key of the issuer, which also allows the ID token to
          # be shared among clients. Doing so however adds some operational
          # costs. We should consider this for the future.
  
          secret = id_token.access_token.client.client_secret
  
          return id_token.encode(secret)
docs: Return encoded ID token.