code: function SmartyStreets(httpAdapter, auth_id, auth_token) {
      SmartyStreets.super_.call(this, httpAdapter);
  
      if(!auth_id && !auth_token){
        throw new Error('You must specify an auth-id and auth-token!');
      }
  
      this.auth_id = auth_id;
      this.auth_token = auth_token;
  }
docs: SmartyStreets Constructor
  @param <object> httpAdapter Http Adapter
  @param <object> options     Options