Slack: Get Slack Id By Questetra Account User

main();
function main() {
  const oauth2 = configs.get("conf_OAuth2");
  let text = "";
  if (configs.get("Text") !== "" && configs.get("Text") !== null){
    text = configs.get("Text");
  }
  const quserNum = configs.get("conf_Quser");
  const email = engine.findDataByNumber( quserNum ).getEmail();
  const slackIdNum = configs.get("conf_SlackId");
  engine.log("email: " + email);
  const id = usersLookupByEmail(oauth2, email);
  engine.setDataByNumber( slackIdNum, id );
}
/**
  * users.lookupByEmail https://api.slack.com/methods/users.lookupByEmail
  * @param {String} oauth2 
  * @param {String} email
  */  
function usersLookupByEmail(oauth2, email) {

  let getUri = "https://slack.com/api/users.lookupByEmail";
  let request = httpClient.begin()
  if (oauth2 !== "" && oauth2 !== null){
    request = request.authSetting(oauth2);
  }
  request = request.queryParam( "email", email );
  const response = request.get( getUri );
  const status = response.getStatusCode();
  const responseTxt = response.getResponseAsString();

  let responseJson;
  try {
    responseJson = JSON.parse(responseTxt);
  } catch(e) {
    engine.log("failed to parse as json");
    engine.log(`status: ${status}`);
    engine.log(responseTxt);
    throw `Failed to users lookup By email. status: ${status}`;
  }

  if (responseJson.ok !== true ) {
    const error = `Failed to send`;
    engine.log(`status: ${status}`);
    engine.log(responseTxt);
    throw error;
  }
  engine.log('Slack Id:' + responseJson.user.id);
  return responseJson.user.id;
}