code: def _add_access_token_to_response(self, response, access_token):
          # type: (oic.message.AccessTokenResponse, se_leg_op.access_token.AccessToken) -> None
          
          response['access_token'] = access_token.value
          response['token_type'] = access_token.type
          response['expires_in'] = access_token.expires_in
docs: Adds the Access Token and the associated parameters to the Token Response.