code: function OktaAPIGroups(apiToken, domain, preview)
  {
      if(apiToken == undefined || domain == undefined) 
      {
          throw new Error("OktaAPI requires an API token and a domain");
      }
      this.domain = domain;
      if(preview == undefined) this.preview = false;
      else this.preview = preview;
      this.request = new NetworkAbstraction(apiToken, domain, preview);
      this.helpers = require('./OktaAPIGroupsHelpers.js')
  }
docs: Instantiate a new Okta API Groups helper with the given API token
  @param apiToken
  @param domain
  @param preview
  @constructor