docs: function sendTemplate (recipient, template) {
    return new Promise (async (resolve, reject) => {
      if (!template) {
        reject('template object required');
        return;
      }
  
      let payload = template;
  
      try {
        let response = await this.callSendApi(recipient, payload);  
        resolve(response);
      } catch (e) {
        reject(e);
      }
    });
  }