EweLinkHandler = function EweLinkHandler(gladys, eweLinkApi, serviceId) {
  this.gladys = gladys;
  this.EweLinkApi = eweLinkApi;
  this.serviceId = serviceId;

  this.configured = false;
  this.connected = false;
  this.accessToken = '';
  this.apiKey = '';
}
@description Add ability to control an eWeLink device.
@param {object} gladys - Gladys instance.
@param {object} eweLinkApi - EweLink Client.
@param {string} serviceId - UUID of the service in DB.
@example
const EweLinkHandler = new EweLinkHandler(gladys, client, serviceId);