* @throws nitro_exception nitro exception is thrown.
* </pre>
*/
public base_response login() throws Exception
{
login login = new login(this.user_name, this.password, this.timeout);
base_response result = login.perform_operation(this);
if (result.errorcode == 0 || result.errorcode == 1034)
this.sessionid = result.sessionid;
return result;
}