code: function(token, userId, applicationId) {
      return new Promise((resolve, reject) => {
        this._start()
            .uri('/api/jwt/refresh')
            .urlParameter('token', token)
            .urlParameter('userId', userId)
            .urlParameter('applicationId', applicationId)
            .delete()
            .go(this._responseHandler(resolve, reject));
      });
    }
docs: Revokes a single refresh token, all tokens for a user or all tokens for an application. If you provide a user id
  and an application id, this will delete all the refresh tokens for that user for that application.
  
  @param {?string} token (Optional) The refresh token to delete.
  @param {?string} userId (Optional) The user id whose tokens to delete.
  @param {?string} applicationId (Optional) The application id of the tokens to delete.
  @return {Promise} A Promise for the Passport call.