docs: function getThreadOwner (psid) {  
    return new Promise (async (resolve, reject) => {    
      if (!psid) {
        reject('PSID required to identify the thread to get owner for');
      }
      
      try {
        let request_options = {
          'path': '/me/thread_owner',
          'qs': {'recipient': psid}
        };
  
        let response = await this.sendGraphRequest(request_options);
        resolve(response);
      } catch (e) {
        reject(e);
      }
    });
  }