Integrating TestRail and Gitlab 10.js

class TestRailAPI {
  constructor(domain, username, apikey) {
    this.base_url = `${domain}/index.php?`;
    this.auth = Buffer.from(`${username}:${apikey}`).toString('base64');
    this.headers = {
      'Content-Type': 'application/json',
      Authorization: `Basic ${this.auth}`
    };
  }
}