Error when create acc

[reversebro]

Fatal error: Uncaught Error: Call to a member function register() on null in C:\Program Files\Ampps\www\pint\index.php:13 Stack trace: #0 {main} thrown in C:\Program Files\Ampps\www\pint\index.php on line 13
Giving this error with this code

setAge(30) ->setCountry('TR') ->setMaleGender(); // ->setFemaleGender() $reg=$bot->auth->register($registration); print_r($reg); ?>